The robust is also a good device, I dont think it gets as many props as it should. Deffo make sure you have a couple spare batteries as I think they are only 14500. I can say for certain the Yezl 14500's on ebay are great!
My first step up to vv was the robust good step up from egos, as KMS said get urself a couple of spare batts as the one that came with mine were not so good. I did spend out a bit more and got a couple of AW 14500 and the battery life improved much.
Simon