Yes, it's definitely worth getting one.
I had trouble with the first one I got - it died within an hour but RMV sent me a new one without even waiting until I sent it back. So I ordered two more.
So now I have one that works, but once in a while it will stay 'on' without the led indicating it, and the button is not stuck. It gets hot enough to boil the juice and melt the cartridge. This happened to me about 9 times the first day, 3 times the second, but then I switched to a new 'method' - I check that the atomizer is cooling before I put the ecig down on the desk, just in case, and I unscrew the atomizer a little so it's not getting any electricity, and, of course, I unplug it from the USB when I'm going to be away from the computer for a while. So I haven't had any problem with overheating these last three days. And I haven't even unwrapped the other two yet - they're my secret reserves <g>
So now that I've been vaping for almost a month, I'll definitely order some manual 'regular' batteries for my 901 when it's time to get more. I didn't think I'd be going for these manual batteries, but they DO produce more vapor and throat hit than my regular battery!
