Kingrinder put a plastic body around a great burr set and bet that there are people like me who would gladly accept that trade off for a package that produces ground coffee that is equivalent to grinders many times the price of the P0. Works great for pour over (30-35 clicks, ~50 seconds), and surprising grinds fine and consistent enough for espresso (13-16 clicks, ~80-100 seconds). Turns smoothly and I didn't feel or hear any metal parts binding while grinding for espresso. I've made many espressos and pour overs with this over the past month and I have enjoyed every cup. I'm especially impressed with the sweetness I can get out of Kicking Horse Decaf, and other medium-dark roasts in general. I would have liked finer adjustments to dial in espresso, but that would be asking too much of a $30 grinder that is not designed to grind for espresso.
A half point off for the reversed numbering of the adjustment mechanism, the incorrect grind setting information, and the P0 feels top-heavy probably due to the light plastic body. RDT is also a must, so it will add a step to your workflow if that wasn't a part of it before. All of these are very minor issues that are perfectly acceptable considering the $35 price tag after shipping.
This not only a perfect travel grinder - compact, lightweight, grinds well - but fills in nicely at home as a dedicated pour over grinder. The price definitely makes me feel less anxious about leaving behind a grinder when travelling as I have a history of forgetting things. I can see a larger version (30-35g) do very well against other grinders of similar size, and destroy the current competition in the sub-$100 category. I'm very tempted to order a second one for use at work.