While there have been some reliability issues with the release of the XD, most seem to have been limited to tuning and DEF systems. Overall almost all brands have teething issues when releasing new models, why expect the Nissan to be any different. No OEM is immune to that, so I'd dare say its to early to really make reliability judgments.
I may catch some flack for saying it, but I'd be willing to bet that had Toyota released a heavy duty diesel version of the Tundra with the same specs as the Titan XD, there would have been massive cheers and it would have been hailed as revolutionary! Not sure why so much hate for the XD, its a great truck and unless you've driven back to back with the domestics, I'm not sure you can really compare based on numbers alone. But even the numbers are better than they seem to get credit for.
I'm more than satisfied with my 17 XD, with almost 20k miles in less than seven months the only issues I've had were the initial alignment, and just recently a turbo speed sensor. All were taken care of promptly and overall service from my local dealer has been great. For my needs, the XD is kind of a sweet spot. Its capable of towing over 10k "comfortably", has great road manners, and returns decent fuel economy. I'm averaging 17.9 mpg, with a 200 mile daily commute of mixed interstate and city roads. My best mpg so far has been 24mpg with cruise set at 65. This thing drives great, and my back hasn't hurt a bit on my daily commutes since I got the truck.
I compared to the other OEM's and test drove almost all of them, my final decision came down to either the F250 diesel/ gas or the Titan XD diesel/ gas. I can live with the 2k payload rating and 12k tow rating of the XD. I'm not looking to tow 20k lbs and if I was, then my choice would clearly be different.
Funny thing is that the payload rating for the diesel crew cab 4x4 short bed Ford was less than the diesel Titan XD (1836 lbs. vs 2003 lbs.).
To the ops thread question, there are builds on instagram like the Nissan Project Basecamp
https://www.instagram.com/explore/tags/projectbasecamp/?hl=en
https://www.instagram.com/p/BaphfJolWyv/?hl=en&tagged=projectbasecamp
http://www.tfltruck.com/2017/05/the-nissan-titan-xd-pro-4x-project-basecamp-overland-we-see-it-in-action/
I'd like to do a build thread for mine at some point, but for now I've been stuck doing outage work with no real free time for any projects.
I did make a little chart with the payload data I extracted from the OEMs' websites and spec sheets for the various trucks of interest. I should probably add towing to the chart as well at some point. Overall, almost all though were rated at over 10k with the exception of the Ram EcoDiesel.