We get a fair amount of Yorkville equipment and other brand name gear as product placement in our business. On various weekends I've tried out the 50 Blue and came away quite impressed.. also tried the 20 Red model... good amps. I hope to get my hands on either model soon. I think they do quite well for rock and blues applications. I too consider the build quality to be decent; do you know otherwise for a fact, CocoTone?