Aren't the puremax pods circular?
Evolution Vapes were offloading Vi Classes and Vi Rod's cheap.
To be blunt I picked up around eight Vi Classes for a fiver each and a couple of Vi Rods for eight each and was so content with them I never bothered with the puremax. On the flipside I'm a DotMod whore.... I have more DotRBA's of various makes than you can shake a stick at. I don't do the pods that came with them, they're still in their boxes. Also, I'm a verifiable TC nut, it's the only way to fly.
Depends what you're after, MTL, DTL etc.