The bands seem to be too weak and one (blue) already broke and I've only been using them for 2 weeks. That is disapointing and I was simply working out with them when it happened. The chin up bar doesn't fit great in the door I use it on. The door is probably too narrow, but there were no instructions or information about best width of door to use for this. It will work, but it could be a little better...would have preferred some additional up-front details before purchasing. The bands themselves work fine, just not enough resistance so I have to double and triple up on some exercises. Overall this isn't bad and definitely better suited for a beginner or people with less strength.