If you look on mtbr.com/reviews/ for almost any mtb with a lot of reviews, you'll find reviews that praise the particular mtb and that find may problems with it. One trend is that new owners with little use say mtb is great, while those with a lot of use point out frame and comonent reliablilty problems. You do have to be careful to look at model year of mtb being reviewed, not just model.
And even the top brands (Specialized, Kona, etc.) and models of mtbs get these kinds of reviews. Maybe it's more in how hard the mtb is used and how well it's maintained and how many complex components it has?
Here's my problem. I'm really interested in a new 2005 Jamis XLT 2.0. But if you look at http://www.mtbr.com/reviews/2003_ful...t_122308.shtml you'll see some very bad reviews, and some very good ones.
What do you think about these reviews and about getting this mtb?