Ugh! I had one and would never again! My first tube amp was a '79 Twin Reverb (135-watt, MV, ultralinear transformer). After that one, I said I was done with MV Fenders but, you guessed it, I bought another, the '81 Pro Reverb (70-watt, MV, ultralinear transformer). I am officially cured of ultralinear Fenders. They are designed with too much negative feedback in the circuit (changed easily enough) and the ultralinear OT with 6L6s stacked on top of that results in a harshness that is practically impossible to dial out. 6L6s have built-in negative feedback b/w the grid and the plate (IIRC) and don't work well with UL transformers. KT66s would be a better choice for that transformer, but you still have to modify the NF circuit to get rid of the harsh highs. If you like BF Fenders, I would recommend dodging any of the later MV Fenders.