I picked this amp up for a good deal after hunting for a 50w for a while. I really loved the early version 50w 5150 III I owned before - I regret selling that amp and when I came across this 100w model, I couldn’t resist. The blue channel on this amp has less gain than the 50w model but I understand that’s only 2 value changes in the circuit, so I may make that modification but for now I think the blue channel sounds great already.
It was quite dusty and grimy when it arrived, so I cleaned it up and it turned out quite nicely with no major tears in the tolex or other damage. It’s loud but has a good master volume, and so far I only have two minor complaints. The first is that the power and standby switches are on the rear of the amp, so I have to reach behind it - since I use shelves for my amps, it’s a little difficult to do but not a major problem. The second is that it didn’t come with the footswitch but that’s more of a Guitar Center / Used Purchase issue than anything else… now to hunt down a footswitch online.