I have a pair I bought at least five years ago, and have used at least once a week, and frequently 2-3 times a week ever since. They have worked just fine with no problems. I change the batteries about every six months. I wear foam ear plugs under the muffs, and keep the volume turned to max. Dillon doesn't carry the Peltor brand any more, but I believe they have a model similiar (perhaps identical) for about $130.
Good shooting.
RR