I like what I hear, and I'm pleased with the purchase. YMMV, but IMO if you don't at least try them for yourselves, you're leaving some performance on the table. My system is pretty resolving and I love the way it sounds, but I know that it can and will be better.
When I get home today, I'll have a new Pi Audio BatteryBuss waiting for me. My Mach2 Mac Mini is already DC powered (directly off a 12v battery (connected to a charger)), and from all my research, adding the BatteryBuss will audible improvements. Also ordered and am waiting for a Firewire 800 cable (built with no power) to go from my music storage drive to the Mac Mini. Again, I expect additional improvement.
Everything is relative, but honestly $55 is a cheap night out. You guys get to gether and decide who the biggest cynic is amonst yourselves and I'll send him a fuse to try for Themselves. If you don't like, fine send it back to me. If you keep it, I expect you to post on the board that you have been proven wrong.