I've looked at these pretty thouroughly, and discussed them before, but I have no problem doing it again

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"Worth" is a relative term and I won't go into that here.
As has been mentioned, these are not targeted to people who are familiar with crawl ratios, RTT's, dual batteries and compressor refrigerators. These are targeted to people who like to spend time outside with the family, but are space and time constrained.
If I had the cash, one of these GO trailers would be next to my garage for the following reasons:
1) Can tow it with just about anything - you're looking at off the ground living space for a family of four behind a Subaru Outback.
2) Doubles as a utility trailer - this is a huge benefit to the average suburban, family oriented homeowner, and one that I think they should play up a bit more in their marketing. Yeah, it's a camper, but I can also take it the leaf-composting drop off, Home Depot, etc..... I hate filling my 4runner with branches, leaves, etc.... but need the 5 seats (2 kids) but don't have the space or need to justify a truck as a third vehicle AND can take it camping? Starts to make more sense.
3) Quality construction. The tent is top notch - the trailer design is excellent - I've seen a couple sloppy welds (structurally fine, just not pretty) but the units I've looked at were very early. On that note, a rain fly is totally unnecessary for the target market. This tent will definitely keep you dry in some severe downpours, and the roof is tall enough to make internal condensation a non-issue.
For someone like me who tends to establish a base camp and then explore from there, trailers make more sense than RTT's or "camper" type vehicles.
So its not for everybody, and probably not for most on this forum, but I think when you compare it with some of the excellent travel trailers, and then factor in the increased utility for the average homeowner, the cost starts to look a lot more reasonable.
-Matt