i just picked one up, love it so far, ive only used it for a little less then a day so far, so ill give you my pros and cons with it,
pros it fits all the coils i already have for my aero tank or nautilus, it also has ajustable airflow, the top fill is great. it has a spring loaded chimney for the different coils its nice but makes it a little annoying to get the bottom screwed in when changing coils.
the airholes for the tank are on the bottom facing down directly at the mod, so if you flood it gets all over your battery. the edges are a little sharp, it kinda eats juices. thats all i got so far. ill update if i run into anything else, all in all tho its got GREAT flavor. i almost can't even get over that. it brings out the sweet flavors really well.