Here's my experience with the bender, like most I had issues, either whispy hits, or I would combust, and plus I was getting bits of herb in the mouth piece, so I put the bender away and got the Hercules, pretty much I switched from mainly vaping herb to only vaping concentrates, then like many my tops blew, when I sent it in I asked if I could replace my double for a hammer top, they said sure for a fee. So eventually one day I was running low on wax so I decided to try out then bender with the hammer top, I packed the bowl tight, then I put on a small screen to prevent stuff getting in the mouth piece, I hit the button waited 30 sec, started with some test puffs, oooh nice flavor kinda whispy, I continue to take test puffs and then bam enormous cloud I immediately took the power off (that's the key, power off when you get that first huge cloud) the next 4 hits where equally as big, I then cooled it down, and checked it, I stirred and saw it vaped pretty even, I then continued to use until no more vape, the avb had turned a dark chocolate, I am now a fan of the bender, but imo hammer top is a must and makes the learning curve waaaay easier.