I have owned this amplifier since 1984, I have taken it everywhere and played all size of gigs from clubs to outdoor. When outdoor I used it with 2 Marshall 1960 A cabinets, as the amplifier can drive at 50 watts per channel into 16 ohms. The complaint I got a lot was "It's too loud". It pumped.
The clean channel is bell like, the dirty channel is gritty. The inbuilt effects are of high quality and foot switchable, as are the channels.
Tone control is by 4 band, there is a compressor onboard and these are pleasing and give loads of tonal options.
The inbuilt microphone impedance level recording output was perfect for playing live, I never put a mic in front of the Marshalls I just plugged in the mic cable to the XLR socket on the back, the mixer man loved it every time.
You also get stereo effect loop, headphone socket and external access to the fuse at the rear.
This amplifier is so small, but it is quite heavy to carry about. The carry strap on mine broke a decade ago and I can't get a replacement.
I really don't know why GK stopped making Guitar Amplifiers, the world is worse off since they stopped making them. This is a bloody awesome all rounder, I have played Blues, Reggae, Rock, I always got the tone I wanted.