It works pretty well, the instructions might say to have the cap facing down but I'd reccomend it facing up so you get better hits and nothing potentially leaks down. it might just be me but after a sesh the cover gets really stuck and takes pliers and resblock to get off. I got around it by putting the cap on but not ******** it in since the mouthpiece keeps it in place.
I like to use them for flowers. Keeps everything clean, which is nice. There is a little ****-through that does get on the mouthpiece filter; ****-through gets on the mouth piece filter when you pack the chamber direct, too. The real benefit is pre-loading. Since it's rare that I get to vape twice in a row, I don't have to worry about handling the pod while it's hot. What I do is pack the amount of pods I need for the period of time I'm out and take them with me. I vape one and when it's time for the next a while later, I just take the cool, spent pod out and reload a fresh one. Only little pods to carry, they get very hot so a bit more convection occurs, buy I've used it both ways and if there's a difference I'm not complaining. To cut down on the **** through, don't grind finely or just put nugs in whole. They will vape completely through. And it does work for resin, too, in a pinch.