I find small amounts work well. I also find I need about half the bud when using the Rise compared to my portable to get a similar effect. Don't use it much because the portable is more convenient. If I could leave it setup and not have to pack it away after each session then I would probably use it a lot more. I do find it smells a lot when not in use. Might be the silicone tubing but it's a stinky vape after its been used a while.