My Perspective/Opinion
It's interesting that this post has gotten so much attention so quickly. The reality is that nearly all the campers discussed in this thread are very nich products. There are feature sets, price points and capability levels that will fit just about anyone. I'm a journalist in the overland sphere and have visited with many companies, gone through many rigs at SEMA and Expo, lived in a Sportsmobile for over 2yrs and am currently in the market for a new rig that fits my specific needs of RTW travel with a bunch of adventure sports gear.
I love the van life and my '02 Quigley Sportsmobile has been good to me for North American travel. I love the van layout with its pass through, overall size and creature comforts. I think Sportsmobile offers a quality 4x4 system, the best option for a pop-top on a van and a level of custom build that you don't get with many of the other choices. They have refined layouts that work well for many different types of customers. The negative to a Sportsmobile in my opinion is the quality of the cabinet construction, although I know that it has greatly improved in the past few years. The price tag on a Sportsmobile is also a bit high for the features that you get, and currently you can't get a diesel Van (excluding the Sprinter). The Sportsmobile Spinters look quite nice, but they don't meet my offroad capability requirements.
Tiger, Earthroamer and GXV all offer truly amazing rigs! The interior refinement in these vehicles is second to none. If you look closely at these rigs there are big differences in comparable models, and pros and cons to each brand. In the end it really comes down to what you can afford. I'd love to travel in the new GXV Fuso with the hardside popup camper and pass through. I also know that the over $200K price tag on that rig is not something that I will have the funds to buy any time soon. That is a LOT of travel money! Money speaks in the world of custom offroad capable homes! I also want to point out that Tiger offers rigs that are much more in the price range and overall size of the XP, Sportsmobile, etc... really being discussed in this thread. F550 and bigger platforms are what Earthroamer and GXV currently offer and are in a whole different category of camper.
I've known Marc from XP for some time now. He is very passionate about creating a quality product that he stands behind. He is open to customer feedback, but also does not like to cheapen his products to meet a different market segment. From what I've seen, and through talking to a few of his clients, Marc always takes care of any issues that might arise with his campers. He wants to be known for quality and for having a rig that is extremely capable in all environments and conditions. As was stated, he has more campers on order than he can currently make, so there is a solid market for the XPCamper. Will he sell thousands a yr? Only time will tell. I honestly don't believe that his intent is to be huge. I think that he would be happy making sustainable quantities of super high quality campers for passionate clients that will get out there and use the product for its intended purpose, to explore the remote places of the world.
I really like the construction and quality that I've seen in the XPCampers, both the V1 and V2. With that said I seriously doubt I'd ever buy a V1, as it does not meet my needs. I'm not a fan of the softsided cab over, not having a pass through, the big size or the considerable weight. All of these factors are also why I wouldn't buy any other full size truck camper. I think the flatbed is actually a really cool idea and why many people will buy an XP. On the flip side I personally see little use for a flatbed, as I want a fully integrated rig that I will travel in full time, again my personal preferences and needs. I love the idea of a light weight stripped down version of the V2, with a cab pass through, monster roof rack built on a more capable, when loaded down, platform. Something like an older full size diesel dodge extended cab, 70 Series diesel pickup or Hilux pickup. If money wan't an object maybe the new Dodge 1,500 4cyl turbo diesel coming out next month or the 2015 diesel Chevy Colorado.
I have to say that I'm really surprised by the comments by Chris at UJoint and Justin at HD-RV (jmarquand). I was just in their NC shops this past week, and have really positive articles coming out about both of them on Motus and my site soon. I've known Chris for some time and consider him a friend. We are talking about a possible build together as well, as his 4x4 system is super high quality and he does amazing work. Chris, Justin & Marc collaborated on the V4 build for the 2012 SEMA show and all got quite a bit of positive press for the incredible vehicle they produced. Chris built the van, Justin built the flatbed and Marc built the camper. I know that due to some time constraints, an early production number and some mishaps along the way the camper that Chris got was not perfect, and that he didn't pay perfect price for it. I also know that Marc bought the camper back off Chris, as mentioned before, when Chris's life changed with the arrival of his baby. I believe the camper has since been fully upgraded/fixed and has moved on to a new owner that is out exploring. I'm really not sure where Justin's comments are coming from, but I'm surprised by them. From what I've seen XPCampers are build to a higher quality standard than any other removable truck camper out there. I know that Justin is getting into the business of being a direct competitor of XP, so maybe that was the motivation there? Justin does do phenomenal work and seems to be a very knowledgable engineer, so I'd also have no issues working with him on a high quality overland camper build.
In the end I think there is room in this market place for all of these products. I for one haven't found the perfect answer to my overland vehicle needs, and I've been looking hard at all these options and many others. Find the rig that fits your needs and your budget, then hit the road! Experiences are the spice of life, not how much money you spent on your shiny overland rig.
You can see my writeup on my Sportsmobile West Factory tour here:
http://www.exploringelements.com/snapshot-sportsmobile-west/
You can see my writeup on the UJoint V4 build here:
http://www.exploringelements.com/sema-news-ujor-v4-the-adventure-van-of-your-dreams/
You can see my writeup on the Tacoma V2 Prototype here:
http://www.exploringelements.com/xpcamper-v2-the-ultimate-overland-truck-camper/