Haven't used it enough yet, but it's basically GH has ideals most stealth but sacrifices quite a bit as a result so direct use comparison to Zi/Mi is less favorable. It gives you precise temps but you need to hit it fast and hard so it can be much hotter and harsher, with materials and heater design the vapor quality just isn't anywhere as good as Milaana (Zion is even slightly better than that, more controlled larger more complex heater, all my RBT tech are rough betas though... GH seems near final?). They are all extremely effective tools though, powerful and efficient, its like stealthy self-contained automatic digital tech pen vs glass stem manual analog vapor pipe if that helps? Good for different things, I could run down pros and cons or go into more detailed breakdowns of the two styles. GH is like Pax meets Evo, where as Zion/Milaana are more MFLB meets LSV, sleek precision tech and fancy industrial design vs more simplisitic and naturally intuitive handcraft style, there are some compromises for this size and style but a lot of benefits while the RBT vapes bring their own compromises as well.
Edit:
Just tried a chunky grind in GH still full pack but better overall performance I think (for comparison sakes to above, Zi/Mi takes either) though this is also a different strain. Lotta testing, had a bowl in Blue Ti too, it really is only 2-3 bowls depending on use so maybe 4 max possible (Mi gets 4-6, Z more than double that) but I have much more testing in loads and useage to do ofcourse...
One thing I noticed and was wondering if any other users have noticed is when you click off the GH mid hit (so you can clear the heat going fully on demand) do you get a slight surge in heat? Noticed it on both my hoppers but not necessarily every hit and hard to really judge for sure, as I said more to test, so just looking for any previous user experience?
I do think not having a clicker but instead a more ergonomic trigger would be better from a useage standpoint, but it wouldn't look so much like a fancy pen then (maybe for an eventual Locust! That will be wider for better battery and other improvements too). I know it's not as disguised, but the clicking (and the fast inhale) is also kinda loud so hurting stealth a bit, we'll see about that out and about. I also think longer mouthpieces would be great, ones with cooling chambers especially, maybe some day...
Anyway bubbler time now (did try a few in the pwnt earlier, I think?) had
@Alan make me an 18mm cork sleeve to fit the GH:
Edit Again:
the cork slides a bit so not ideal unfortunately
this is working well though, silver fumed glass hook let's vapor breath a bit first, taste better, though you need to draw real fast n hard so controlling hits is a little tricky with button click style, sessioned it may be better but I wonder if it gets dirtier and sure it gets hotter...