At the time I bought this amp, I was using a Fender Vibro Champ (also from the late 60's) and I wanted something with more wattage. I wanted a tube amp that wasn't going to cost me an arm and a leg. I learned the hard way to be much more skeptical about those glowing sales pitches on eBay. I don't think the seller even knew what Reverb is! If it were lost or stolen, I would replace it with something new - probably a Reverend or a Traynor.
Model Year: 1966
Where Obtained: eBay
Controls are basic - tone, bass, speed & intensity (for trem) and reverb speed. No channel switching or effects loop. Not really loud enough for gigging unless you mike it and/or use a pedal to goose it.
I use a strat, a tele and a 335 copy made by Aria (also from the mid to late 60's). I use a Marshall Bluesbreaker Pedal to boost the volume and to give it a little bluesy crunch. The amp handles blues and classic rock pretty well. I am not as enamored with its clean sound - nowhere near Fender clean.
Update: I just bought a guitar with humbuckers and discovered this amp REALLY likes humbuckers. I guess it's not too surprising that Gibson would build an amp that favors humbuckers.
Very easy to use. I make minor adjustments to the controls when going from strat to tele to 335 but that's it.
Built like a tank. Very heavy. I had it in for servicing after buying it on eBay. Reverb wasn't working and several tubes needed to be replaced. Also needed some new caps. I also had the 2-prong electrical cord replaced with a grounded cord. I think the servicing cost me more than the amp did originally.