Colorado Rail Car still has a lot to prove. They've shown that they can produce beautiful, functional bi-level panoramic dome vista viewing cars, but add power to them and the company seems to just fall apart. Their prototype burned up and the one unit that they have in Florida fails to make any news (maybe that's their best news). The company is probably strapped running Grand Luxe and really bit off more than they can chew, thus neglecting rail car production. Their website shows no 'new news' since May of 2006.
I've spent a good bit of time on CRC rail cars in Alaska, both the ARR's new Gold Star first class ultradome and Princess's domes. They're beautiful, functional, and--from what I've heard from the carmen and other train service employees--work just fine. (I never heard any complaints about them.) In fact, while I don't work there anymore, one of the friends I keep in contact with often bids the Princess charter train from Fairbanks to Anchorage, so she spends 50 hours per week on the Princess equipment. I'll ask her what she knows about the CRC-manufactured equipments' reliability history.
All of the problems I've heard of have been related to their DMU product (and primarily with the engines). I haven't heard of the car itself falling apart or anything.