It depends on what you are using them for. if you are doing abrasive stuff then they aren't durable, if you are doing normal mechanical stuff then they work well. make sure you buy the right ones for you intended purpose. They can't be too thick or stuff or you loose dexterity. size them with a snug fit, it will ensure dexterity. I have a pair that I have used quite a bit, washed several times, and they are still in good shape. I wash them by wearing them and and going through the motions as if I were washing my hands.
They are military issue if that means anything to you.
I've also used Ringer's Resource gloves, they were also durable.