Damnable Cigreen, man.
I got the Holmes v1 a while ago and haven't stopped using it since. Perfect atty, right? And I dreamt of a MiniHolmes. Single coil, in 16ish mm? Mmmmm.
So what do they do?
Screw up the existing Holmes' design?
...
The hell?
I read that they removed half of the airflow (only 2 air holes now). I am very disappointed; I thought I was essentially getting a Holmes v1 but they seem to have ruined it.
If that is the case, I agree. The four air holes is what makes the holmes rock.
I just received a Holmes v2 and it has four air holes feeding into the two "air posts", same as the v1. So the only things changed are the two-piece top cap (so you don't have to unscrew the whole top cap off to refill, just pull off the top part), and a slightly less efficient heatsink (the grooves aren't as deep, and there's only two grooves, not three). However, there is a Delrin insulator built in to the drip tip hole, so it should keep the drip tip cooler than the v1 even with the decrease in heat dissipation from the heatsink. There is also a pattern machined into the heat sink that (sort of) matches the pattern on the airflow ring.
On mine, the o-ring holding the top part of the cap is
extremely tight, but it should loosen up a bit over time. I'd rather have it too tight in the beginning than too loose anyways.
Overall, I would consider it an upgrade. Big upgrade in convenience, slight downgrade in heat dissipation via the heatsink, but the Delrin insulator compensates for that. The top from my TOBH v2.5 (which has four deep grooves on the heatsink) fits on the Holmes v2, and the drip tip stays just as cool with that as it does with the Holmes v2 heatsink.