I've recently tried the Cloud with my two other glass pieces--a simple, but well-made local tube with a six-slit downstem, and my Headford Triple Doughnut layback inline bubbler. Both were very nice with the VXC. The Headford was easier to use with the Cloud than I thought given how the female opening is positioned--I thought the Cloud would be in my face since the Headford is so compact, but it wasn't at all. But still, I prefer my Hydracirc over those other two--by far. The cost/benefit analysis for me favors the Hydracirc. I simply didn't get that much more enjoyment from using the other glass, and it required more effort since I needed to turn the Cloud upside down.
When I used bOObs' Mobius glass, that was really nice, but I still prefer the Hydracirc.
Jurassic - I know what you're referring to by the vapor that comes out after pulling the Hydratube off. I see it too, but it's only a little wisp right after the tube is pulled. I don't see vapor come out after that, though I still take the ELB out so I don't cook it while idle.
Happy Vaping, from your friendly neighborhood Unfrozen Caveman Vaporist!