so ive posted several times here about the terrible experience ive had with my purchase of the blu starter pack...almost no vapor after just a few puffs, no flavor, ect...I just purchased a new kit from a different vendor and their carts are a 510 connection, and I thought to myself these carts look like they would fit my blu batterys so lets hook one up and see what happens...it vapes wonderfully and gave full tastes and tons of vapor. so im assuming the whole problem with this blu starter pack I bought at walgreens is that the carts are just either old and dried up or maybe blu pre-filled carts just plain old are junk? now I didn't give this a lengthy test, I just took a few puffs and said to myself - wow. too bad the blu carts don't vape like that...even the latest pack of carts that blu sent me for free don't vape right...but when I used a different brand of 510 threaded cart on the blu battery it was like night and day difference...im just saying !!!