I owned a bike shop and went to bike mechanic school so I feel qualified to review this bike.It was extremely easy to assemble. The most difficult thing about building it was getting everything out of the box. Assembly is basically putting front and rear feet on, sliding seat post and handlebar posts in, putting pedals on and attaching the seat and handlebar assemblies. Those are pre-assembled so they both simply bolt on. There are basically 8 bolts and the two pedals. All necessary tools are included, however a 13 and 15mm ratcheting wrench will speed up assembly.There have been complaints about the seat being uncomfortable. I found it to be well padded and typical for a bicycle. Proper seat adjustment is critical. Check YouTube for instructions for male and female cyclists and proper saddle height. They are both critical for comfort and for preventing injuries.There are 4 carriage bolts that come from underneath the feet to mount them to the bike itself. I strongly recommend taping them in place from bottom so they will stay in place then you can just drop the bike assembly on them and they will stay in place until you tighten them. I always recommend attaching any bike pedals using Loctite Blue that assures a secure threading but is still hand tool removable.My only complaints, and they are just personal preferences, are that the resistance settings are continuous rather than clicking into repeatable settings and that the pedals would be very uncomfortable without shoes. I typically workout in my sock feet.In short, it’s a great bike for the price.