Fork, Pedals and Seatpost are the weak spots for me. Drive train is pointless, good bad or ugly, any of them work well enough to ride. The fork is getting a bad rep and is breaking (seals blowing), the pedals...well...they are toe strap pedals, need I say more and the seatpost I would bend looking at it. I only buy thomson.
Saddle might be a weak spot if you don't like it.