People love Fenders, but I’ve owned a vintage Vibrolux Reverb (1970) and Super Reverb (1968) and they were both finicky amps, but well regarded amps. You have a volume knob that goes to 10, but don’t turn it above 4 or it becomes an inarticulate mess (especially with anything other than single coils) and unless you have something like a tweed Bassman or have extensively modded it it probably doesn’t sound that good overdriven (hence why guys usually push them with any number of drive pedals). You have a bass knob that needs to be set conservatively or the bass overpowers everything. The mids are fixed. I’ve gathered a number of builders have tweaked them over the years to fix some of these questionable design choices, but they’re popular so I’m clearly in the minority.