Don't know about the Catamount specifically, but the "URT" (unified rear triangle) technology was used by Trek and a few others some years back and has fallen by the wayside. Lots of pedal-induced bobbing on the Trek I rode once, and (most troubling in my book) since the bottom bracket moves with the suspension, your feet change position in relation to your hands as the suspension moves. I found the sensation really weird. Also, it may just be a trick of the photography in the built-up ones they show, but the standover height looks scary high. I involuntarily clench my twig and berries every time I see a pic ;-)
It's cheap as heck, but I think you'd be better off spending a bit more (or looking at something used) and getting a more current technology, whether 4-bar, single pivot, etc.