I did not buy this here but for $230-240 it's a pretty impressive amp especially with a Mullard or other quality NOS tube. It's better my NFB.11 but the two are different beasts.
It's a very solid well built amp/dac. The AK4490 sounds great and 2000 mW is a nice amount of power it will properly drive a T50RP.
TL;DR: Great amp/dac, a unicorn in the audio world. Buy if you can.