I can't compare blu to any other e cigs, because i havn't tried any yet. If you smoke like i use to though, you will be very sad after a day with the blu cig. I dont know if i missed these "new carts" i hear about but mine only last about 3-4 cigs worth and the last half is usually little hits. I find if i remove the tin foil inside with a bobby pin (without pushing the inside cap farther in) and never remove the cart till its done i get maybe 5 cigs....... but still the last 2 are like vaping nothing. When i say cig i use that term lightly because thats if your hit your cigs like a 14 year old girl. I personally get no more then 15 decent hits, not cigs, but hits. Plus after they stop working the "cotton ball like" stuff is still wet. On top of all that, batterys last only 2ish hours if not less on constant use (and it will be constant because your hits are so unsatisfying).
If you have a blu already, id recommend trying to get your money back or modding it (though i havnt tried that yet, and i hear it voids the warrenty). If all e cigs were like a blu they would already all be out of business.
If you want something that will help you stop smoking, this isnt it (at least for my old smoking habits). I wish i could make a suggestion on what to get instead but i havnt come that far yet. But for a fairly heavy smoker, id recommend doin some more research.
As for me......ill be waiting on my big chuck with an 801 attachment, and my 801 atomizers/carts from a site i will not name, even though i got a email 2 hours later saying they were shipped!
And sadly, smokin my analogs.