I've had this a few years but not used a great deal as I have several amps and like to switch. It sounds great and surprisingly drives my Monolith M1570 planars very well with good bass. (The specs show it works with headphones with an impedance of 50-600ohms.).
It sounds sublime with my HD650s and my Beyer DT880s but I also prefer it to my SS amps with planars.
I'm only selling as I've moved up the Eufonika upgrade path. In fact I sold all my Little Dots (inc. a IV SE) and wouldn't buy anything else now.
It has Philips 6922 and Svetlana 6H13C valves. I believe this example was designed around the 6922 rather than stock 6N1P so you have more rolling options (and it sounds better too I think!).
It also has 4 chokes inside and runs virtually silently, better than any other valve amp I've owned
It has a dint in one back corner so I'm asking a fair £150 for it. Collection from N London is best but I can pack very well and send at buyer's risk (no incidents to date in my years of posting hifi).