Just wanted to say that i've owned a HA 2.2 since December and I love this thing!
It's so efficient and easy to use that even though I have and use several other vapes I find myself reaching for the HA more than any of the others. It's basically maintenance free and although I've dropped it many many times already it still continues to perform wonderfully!
My current favorite way to use it is w/a Solo 14mm Gong stem and a relatively cheap doubleBubbler. It give the easiest clouds of all my vapes and goes for rip after rip from a single small Solo sized bowl!
I also use it direct-draw w/ both the traditional Teflon mouthpiece by itself and/or w/a glass MFLB stem and also w/the Solo bent 4-hole stem/bowl as well.
I haven't used it w/pump and bags yet but I'm thinking of using the pump to fill one of my mid-sized glass pieces repeatedly and see how that goes....
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Kudos to HA for such an excellent piece of kit!