I haven't tried it but the Bloog MaxFusion has been getting some ink as being relatively hassle free.
I read about those recently and it
seems like they're as simple a system as one can get (for now). Bloog's running a 25% off sale this weekend, so I took the bait and ordered a kit, two spare batts and some blank cartos. It'll be my first 808-based kit.
Don't get me wrong, I'm pretty stoked with the 510-T but the 180mah batts that fit my PCC just don't cut it, really... close, but "no cigarette", as it were. And the "mega" PCCs for the 280mah Joye 510 batts don't really hold enough kit for the day (to be fair, I'll probably have the same problem with the BMF PCC, but we'll see).
Everyone seems pretty impressed with the BMF cartos. It looks like they're mini versions of the Echo-e cartos, which are great when they work... My personal failure rate on those was about 80% after just a couple of days, but I've heard about BMF cartos taking 10-20 refills, so I hope that will be my experience.
The biggest thing I foresee that will keep this out of the "just like a pack and a lighter" UI metaphor is refilling cartos. I simply can't see myself recommending ordering pre-filled and tossing them when done, but filling pretty much any carto is more pain than many possible converts want to deal with. Plus, there's no visible indication of when it's about to run out. I guess much will depend on how long a pre-filled carto lasts.
I addition to simply (hopefully) getting a compact kit that carries well and lasts at least the whole day, I really need something better to recommend to friends. Since I've been vaping two friends have gotten 510-T kits (or 510 kits with some 510-T tanks and attys to check out both worlds) on my recommendation, and there is still enough of a learning curve that they may not stick with it. And more friends are interested, if I can show them that vaping doesn't have to be a PITA.
If the BMF's are easier and work well enough, while I hate to point folks to a pricier solution I'll do it if it just works and filling the cartos turns out to be a consistently easy task.