First up the construction. Unfortunately the English in the manual is not very good and the diagrams unclear. I can see how someone could struggle putting this together, even though the central body of the bike come pre-assembled.
My main problem with construction was that either because every piece had been painted or because the holes/bolts were the wrong size on occasions it was a serious struggle to get them in/attached.
In addition you will need better tools than provided in the box to really tighten the various bolts and nuts.
The core part of the bike solid and reasonably well made, the pedals, cross training arms, seat and resistance adjustment all work well and are causing no concerns. The bike's base seems a little narrow but this only seems an issue when cycling very fast (perhaps uping the resistance is a better plan).
The LCD display seems a little detached from reality in how it counts and looks and feels cheap. Also the central handle bars wobble a little despite fierce tightening of the various bolts.
Overall an exercise machine providing a good workout, but a pain to build and not really possessing a good monitor for your performance.