Now most of you are gonna cringe at this, but I just bought a dual suspension bike from K mart for $100. Its licenced by Honda, and has shimano components. "honda trail pilot". Its what I could afford right now. For the past month Iv been riding almost daily for miles through as much crap as I can find... woods, rocks boulders, potholes, swampy trails etc. I just got my third flat tire yesterday, replaced the rear brakes which were caving inward, and jammed the derailur up into the spokes. Hopefully I can straighten it out good enough to ride, but right now the chain just hops off. So anyway, this is my introduction, Im from Massachusetts. Im interested in the chainless mountain bike by Dynamic, but all I hear is critism. Im going to try one out when the bike I have now is hopelessly trashed. Im not a racer or anything, so some loss in efficency wont matter much compared to the burden of pulling branches out of the gears, hoplessly twisted deraliurs and bottoming out on rocks. Aside from chain and gear issues, my biggest complaint is the fact that the front shocks are not adjustable.
The worst thing about Xmart bikes is how they are assembled and adjusted - such as getting derailler tangled with the spokes. So study the Park tool repair site and get everything working how it should