Roadrunner
Power User
Its a mono pedal amp.The Harley Benton GPA-100 is very cheap and has a lot of power for it's price/size.
I have its brother, the Thunder 99 which is stereo (same pedal BTW as the Carvin Mach 100 but cost less than 50%).
Its "ok"....not more than that. It is a perfect solution for home use or small (very) gig.
It doesn't holdup in a loud band when you need to feed a 4x12 or even a 2x12. I noticed its clipping very fast (volume cuts to non for a 1-2 seconds).
If you are not planning to overtake Wembley arena than its a good solution.