I bought one of these for the glass tank and was looking forward to it. I also wanted a tank using the ego treading for my SiD to give my 510 a rest. I have been mainly using a Vivi Nova 2.5, but wanted to give the ET-S a try for the glass and dual coil. I've tried it several times now and can't stop it from gurgling and leaking. I fill it up, and it works good for about 30 minutes before I start having to blow it out. Before I know it, I'm taking it apart, making a mess, pouring my eliquid down the drain, and then trying it again. I've tried 3 different heads, cleaned everything each time, looked at it really closely for any problems and don't see anything amiss. I'm back to the Vivi Nova and wished I hadn't tried the Aspire. Of course I bought it and plenty of heads, so now it's just taking up a lot of space in my vape box.