Agreed - some much pricier tube amps have used PCB's. The quality of the PCB itself is important, but if that's good, then who cares.
Really the only thing I worry about with tube amps and PCB's is the surface mounted tube sockets not causing traces on the PCB to break when the board flexes as you tube roll - but since this is not a tube-rolling amp, that really shouldn't be an issue either.