These are perfect for a quick exercise of the upper body. All of the many brands of stretchy bands are convenient, but the SPRI I find to be the most comfortable to use and most durable. Another brand accidentally slipped out of my hand, snapping back and hitting the door, and shattered the handles. And because I have butter fingers, I let the same thing happen with the SPRI and the handles did not shatter. The rubber tubing is very well made and doesn't dry out and become brittle if you do things like, say, leave it on the floor for days, toss it in the back of your hot car and forget about it, or something like that. So if mine last for 2 years doing that kind of stuff, imagine how long it would last if you actually took care of it? The only caveat is that this particular package does NOT come with a door harness loop. So if you're planning on using it for that, you have to order one of those separately.