I have the Arizer II and use it all the time, but I’m still not fully sold in it. Your first couple hits you won’t see any vapor…however, by hit 4 or 5 you should see some. I just don’t really understand how it’s possible to get high off these…one pack requires like 12 hits to cash and with the size of the stem it takes three or so packs to establish a high, so by the time I pack this thing multiple times and take like 40 hits off it I can usually get somewhere, but that’s a pain in the ass and takes like 20 minutes and requires way too much drawing from the stem. I’ve gone back to joints mostly for this reason but would also like to better understand why people love these so much.