Super compact. No waste. Used twice daily since purchasing, ~1 month ago.
Filter: Works much better than I expected, after trying stainless steel filters for pourover and aeropress which were never quite fine enough and made for gritty coffee. Regardless of grind, there's *tiny* last sip which I don't drink because of grit, but that could also be my grinder (Breville).
Mouthfeel: Smoother than french press but heavier than aeropress or pourover with a paper filter.
Error rate: I've only totally f'd up only one time, the second time using - the outer rim wasn't tightened up against the lip of the cone when I tightened the top on. Flip, push down, and coffesplosion. I've never found it like that again when I check, so really not anything to worry about.
Cleaning: Easy, but I've picked up one pro-tip after ~60 uses that makes it even easier. After I'm done pushing the coffee out, I do *not* flip it back over! Amazingly, it doesn't really lose a drop if it's upside down, so no worries about it dripping all over. So I take it off the cup without flipping, knock it against the inside of the sink once, and then unscrew and dump the coffee grounds from the top cap into the garbage. If you *do* flip it over, the coffee falls back into the cone, and there's just more grinds that end up in the drain and you have dump both sides into the garbage.