I have used the original GC350, 500 and now the new outlaw. Most of their sounds are really good, relatively easy to program. The 350 and the 500 are not the loudest, if you can replace to speaker to a more efficient one you will get better volume and typically better quality sound. The Outlaw is nice and loud, it’s louder or at least as loud as a foxpro banshee or flx500. Remote range is awesome, best part is their battery life is the best, at least compared to foxpro or flextone. What’s also nice is their extra sounds are free and reliably good.