I actually know couple of people with those radios and they are great. Don't skip a beat. I know Venom use them in some of their kits but I think other manufacturers might also. It is way easier to use than the GT3B which I used to own. The only down side is that receivers for the HK-310 the receivers are more expensive. Still it seems like a better radio than the GT3B.

The analogue version is called HK-300.