I haven't had any major problems with Eastmall, except they haven't been very good at sending the liquid I ordered (three orders of 5 bottles, two of the orders had at least one flavor wrong)
I made that comment because JD at Truesmoker is a good guy and I'd rather deal with him any day. Great liquids too, but I wanted to try some of the wild flavor David has. Rose, Litchi, things like that (both are good, btw. just not up to the greatness of JD's Honeydew, Blackberry, or Truesmoke flavors)
I'm getting used to the 510, still occasionally forget to push the button but not often. Does anyone else think that flavors are a bit muted through it? Not nearly as bad as a 601 but while there's way more vapor with a 510, at least with my 901/801's I can tell what juice I have in there. Maybe it's just me, I don't know (I ordered this on a whim, just to see what the big deal was).