Hi Guys, this amp is so much better sounding than some mass produced designs. This amp is very similar sounding to our $3900 desktop amp the Prautes. The Prautes is a step up for sure and sounds as good as ANY amp. The Sustain84 is not quite on the level of a hand made point to point amp, but I wouldn't sell it if it didn't just straight outperform. The look is similar to the big iron as well, with removable tube shields and roll-able tubes. The design is straight forward and purely for headphones, so it won't start to annoy you with a lot of unnecessary bling.
If you ever have an issue or a question, you don't get some faceless twitter account, you get the owner on the phone, I do all customer service. If you aren't happy, I'm not happy.