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.