On stage at loud level, yes.
In a studio environment at low to normal level, it's just impossible to use as it's way too noisy, but, that said, it's a really simple and good sounding amp, for sure.
Can't you hear the massive air flow ?
That said, it's a major problem with almost all fan cooled amps, except the AER and Glockenklang amps, which have dead quiet fan air cooling.