[Reviews on this site lump all models together, though they are very different machines. This is for the SB 120, the least expensive of the models.]Box arrived four days early. Half of "Incredible Hulk" (2008) was watched while it was slowly assembled by an elderly retired pencil pusher with a bad back. The hardest part was opening the box. Every part was clearly marked in reference to the extremely-detailed step-by-step directions in the owner's manual, with the nuts, bolts and smaller pieces on a shrink-wrapped card with each item carefully numbered to correspond with the directions. The cables all easily clicked into place, though it would be fully functional for exercise without them since the electronics are only for the unnecessary-to-me readouts of time, distance (on a machine that doesn't move), pulse (telling me I'm alive), plus a few other items I don't care about. But connect them and maybe the moving numbers will entertain you. As indicated in the manual, they are easily reset for each ride by holding down the mode button.The only recommended change for assembly directions is to put the pedal straps on last so they can be set in recognition of the users' shoe fit and comfort. Using my own ratcheting socket, allen wrench and screwdriver was easier than tools provided, but if you don't own tools, no worries.Everything is solid and works and keeps on working. The seat position lever is a tad tight to lock in place, so the 95-pound female spousal unit needs assistance to change it. It works for users spanning from 60-inches to 71-inches tall, neither needing it to be closest or farthest back, respectively.Overall, it is a good solid purchase. If you pay more for more expensive models of this or other bikes, you pay for fancier electronics, magnetic resistence (which is what caused death of my prior machines), access to exercise programs, plus a larger, heavier machine that takes up more space, is harder to move around, and is more likely to have problems in shipping damage, electronics failures, and assembly difficulty. If you need more than this machine delivers, join a gym.