Instruct: Classify an Amazon review into positive or negative sentiment.
Query: More problems than it should have

For what seems a simple device, this has some problems that I did not anticipate when I ordered it. I rate it low because such a simple device has only a few features, so a few problems means it's overall problematic.1) It has a very strong rubbery smell that gets on your hands2) As you work it in your hand, the rubber resistance piece works itself off - imperceptibly at first so it just seems that the resistance has softened - and finally slips all the way off - after say 20 or 30 quick repetitions. You have to keep pushing it back in place just to use it.It does have some advantages. Good, I think, for larger hands. Grip is cushioned, but still works against your skin enough that over time it may help develop calluses (great for me since I'm using this to strengthen for windsurfing, which is tough on hands).