I have heard nothing but good things about Innokin.
When I started out I purchased an artic tank, and the taking it apart to fill it 5 times a day got annoying real fast so I began looking for a top fill tank and came across the TFV4 a few days before it was set to be released, so I picked one of those up locally. After using it for a week or two, I was hooked and just loaded up on them.
My post wasn't a knock on anyone, more of a why I do it the way I do type of thing.
I've been wanting to get my hands on one of those disruptor's for a long time though. Innokin seems to be a company with some really cool technology. In fact, they are the only manufacture on this forum that I "watch" their sub section to get alerts for every new thread.