I've been using a regular joye 306 for about a month...month and a half now and I dig it..
the things they have going for it....
it's a 510
threading...
slightly smaller than a 510 atty...
exposed bridge (kinda like the m4x series)...so a good dripping and dipping atty...
slightly more resistance on the standard 2.5Ω versus 2.2Ω
so with the slightly larger and exposed bridge you get just as much if not more vapor production that's ever so slightly cooler than the 510 so it's a bit more flavorful
and the mesh and ceramic pot is smaller so flavors don't cling and hang around forever like a 510..
the con is that the carts for it suck

they're really bad so unless you're dripping, dipping or using a
juice feeder they might be something to stay away from
the carts themselves I'd say about half the capacity of a standard 510 cart and real prone to
juice in the mouth...and a pain to fill...there's a little resevior cup that you have to push up out of the cart with a paperclip or something and then fill that and put back and seat down in it...
as far as the LR ones go... currently there's 2 or more makes out (for simplicity we'll say 2)
there's the cisco made ones (that are only sold by ELP and nhaler currently) that are made to tighter specs and tolerances (1.5Ω) and seem to last longer... and then the other ones....
the hype seems to be mainly for the cisco made ones...there's a thread in the canadian subforum....and a vid review by grimm green