I've always considered them to be low-end solid state amplifiers that you'd find in mom and pop music stores. But I've been intrigued by them lately. I was watching a YouTube video of a recent (2013 or so) Ted Nugent concert, and he had the usual 6505 half stacks behind him, but sandwiched between them was a solid state Kustom combo, and that is what has the mic on it. It seems that the half stacks are there simply for his own enjoyment, but the mix is carrying the sound of that solid state Kustom. I am more into an overdriven tone than a clean tone, most of this video focuses on the clean, that he does use the overdrive later on and it sounds pretty much what I've seen in the Nugent concert videos. Looking on the used market, these amplifiers can be had for very little money.