I own one.. And I would give it 2.5 out of 5 stars.. The unit feels a bit heavy and awkward and feels like its a leave at home unit to smoke while your on the computer. Because of the awkward heavy it feels like it could slip out from your hands if your hanging out with your "compadres" or walking with it.
The mouthpiece spits back if you don't allow it enough time to saturate the e-juice into the cotton.. However, I have also gotten plenty of dry hits from it because sometimes you just have to be bold enough to give it a good strong pull and allow it to spit back at you to actually pull the juice back into the cotton..
Also the battery doesn't last as long as you would want it to.. If your a hardcore smoker the most you will get is about about 2 or 3 hours.. Then you would have to charge it again..
I would say when all these hurdles have been defeated the unit works really well. But you don't want to have all these arguments with your e-cig.. lol
To be honest I bought this unit to test out illegal substances that I could blend with e-liquids since it doesn't have any coils or ceramics to ruin anything..
So far the cotton seems to filter things pretty well..
I dunno how open this community feels about such things so I am not going to be so bold since I just joined this forum.. lol
I got mine from MyVaporStore for $47.
They have 10% off coupon codes if you search google.
USONICIG Rhythm UltraSonic Starter Kit
And cheap priced additional Cratridges from MyFreedomSmokes for $5.95
Ryhthm Ultrasonic Replacement Cartridge 2ml
Welcome mate and thanks for the appraisal. I still think that the technology has a long way to go before it can compete with the established methods. I'm still interested to see how it progresses though.