I bought this bubble glass only because I thought it would be fun to try it. It worked better than I thought it would and I'm using it now. The glass was easy to change and I didn't even make a mess while changing it. I have purchased many RTA's and the Zeus duel is finally the one I will use for a long time. I'm using a single Clapton coil in it and it works great. It's a 2.5 ID SS316L 26/36 7 wrap spaced at 0.60 ohms running my mod at 25 watts.