@jetter
Hi,
I'm in the UK, so bought directly from Poland.
As for installation, it is very easy, and full instructions and pictures are included. The most difficult part was putting the damn Node back together 🙄😊. But that may be down to my big fat clumsy fingers 😜.
As for SQ improvements, there was a drop to the noise floor, music sounded more fluid and relaxed, not as "digital" if that makes sense. I do use an external DAC, but the benefits enjoyed are still present when sending the signal out to a DAC. I'm no expert, but I guess removing the in-built SMPS board is the main, beneficial factor.