I own a total of 6 Billow V3's between the regular and plus version. They have amazing flavor for the size (much better than the Griffin), but the airflow could be better. I've never had leaking issues with any of them, which is why I build and loan them to my friends that aren't as experienced, because they're super reliable. The filling method is about the easiest out there. The one complaint I have is that the "peek" insulator seems to degrade easily causing connection issues with the posts, and replacements apparently aren't available, but for the price it's well worth using and disposing after some time.