I have had a Theis for a while now. I like it but it does "squeak" in the begining because of the leather rubbing against the plastic/metal. It will go away with use.
As for Stealthgear all I have is a mag carrier. It seems well constructed but I have only had it a short time. During that time I have only worn it once. Only because I don''t carry the gun it goes with often.