I bought this rack and put it together and got grease everywhere because the bolts and nuts come covered in grease. Without common sense, it took 30 mins for me to assemble, undo, and reassemble the first two tiers. these are very comfortable except that i am on the heavy side weighing 280lbs with plantar fasciitis and only thing i didnt like about these was the strap bothering me near the arch side everything else i really liked about them but had to return them unfortunately because of the strap pain. Maybe it was a fluke but the sound quality on these when someone calls is very poor. They included everything needed to mount them (aside from typical tools), including two types of drywall anchors and the Allen wrench for the set screw. Note: writing this review about 2 months after buying them. Go figure. Gave it four starts because I feel it a little bit uncomfortable around my shoulder area so definitely can?t wear it all day. Clothes and lets just say he didnt want to take them off.