I need to give these guys some props - have been running one of the Halo Handstops and 2 Halo Miniverts for a while now (I believe since shortly after each release); all are absolute top-notch quality machining, fit, and finish, super light, and look/feel great on the guns.
Beyond that, IMHO the Minivert is an absolute work of art when you consider the ergonomics & contouring in addition to the aforementioned machining/finishing quality. Only problem I have with them is not having enough to go around!