I have the vamo 3 and it works great. I also have the Tesla, it is another great mod. I would recommend either one. I got both of them from amazon.com for under $65 a piece, at the time I ordered them.
Vamo V2, V3, V5 -just get it! Cheap, does its work well. Anytime (if you ever want to) you want to upgrade, you do without feeling that you invested to much. I still use my Vamo(s).
I went with SS versions for mine and then got some skins when I wanted a change (nice thing about Vamo's is that there are plenty of skins around to buy or download, print and cutout etc.)
Plus a lot of the attys are silver in colour so it looks neater to start with but each to their own!