I've had it for a couple of days now, and I'm very impressed! I was going to get the newer Zendrive II mosfet version, but this was priced right. I don't know if I should place it before, or after the double Hot Cake? The Hot Cake is buffered, so I'll assume it should come before the HC? It's got a 12AX7 tube in it, so I placed it after the HC.