I've built three of Bruce's amps and all have been very satisfying projects. The GG Pre Amp and the SC150 Amp have been running for five years and the CCS Pre Amp running for four years. None of the amps has had a tube failure nor any component failures. Their sound is excellent.
Here's Sang's verison of a Bruce Rozenblit's Super Compact 150 Watt Amp from Audio Reality.