Feature:
I got mine as a "blemish" for $45 less than new. It was just a return- looks fine.

Quality:
Many E-H pedals are now cast versus stamped and bent heavy gauge sheet metal, which I think is a massive improvement. Not all their pedals mind you, and the sheet metal ones are fine as well.

Value:
The entire nano line are priced super competitively. Some of their products can get very expensive, but in al cases are worth it, IF it's what you are looking for!

Desirability:
Most desirable. I am thrilled they included the POG into their nano line.

Sound:
I owned the much larger POG, and to be honest, for my needs it was overly tweakable and too large for my pedal board. I will use the nano with my bass for gigs, plus I occasionally do electronic/Merzbow-esque shows. Although living in Vermont those are few! Again, the octave up is super clean (or can sound like an organ as played by JS Bach) and that makes it a unique effects pedal in an incredibly over-saturated and confusing pedal market. Since the resurgence of E-H I believe everything they make is useful and well built. Even the stuff from the 70s is highly prized as innovative. Do not hesitate.

Ease of Use:
Compared to the big POG, it's a no brainer- with of course less possibilities for the larger's incredibly wide range of sound manipulations.

Support:
Usually very responsive and helpful. But this was about 5 years ago.

Overall:
I think a summary is unessary, as I've described well enough above.