Got mine in about 5 days ago... would send it back if I didn't think it'd make a passable backup for my, which should hopefully be arriving today, new e-cig.
The Blus are pretty much as everyone's said here... the cartridges suck (you'll be lucky to get 20 hits off of them before they stop working), and the batteries are terrible. I get about 15-20 mins from a charge... it's pretty sad.
IF you need something for a trip to the store, or if you're just out and about for a few minutes here and there... it's probably not going to be that bad for you. But using them as your daily (at home/work/etc) smoke... no good.
That said... the MAIN problem I have with them is the cartridge... they're just terrible. But, if you refill them yourself, they work a LOT better... but you're still going to be hindered by the battery life. After a refill my carts last much longer... and actually will go through 3 battery charges. Granted, that's not saying much, but it's better than how they come from the factory.
And just to nitpick... they flavors they come with... not that great. The Classic Tobacco and Menthol (even though I normally hate menthol...) are the best of the bunch. The Java tastes like crap, the cherry is weak at best, and the vanilla sucks for more than just taste alone. The vanilla flavored carts were the worst of the bunch as far as vapor went, I don't know why, but I barely got anything from them.
Style wise, they're great. I love their pack and the overall look of the cigarette. But I just don't think battery technology is up there enough yet to have a package that small and still have good battery life.
So, they're easily a 10/10 for form... but a 4/10 for function in my book... hopefully you'll like them better though. Try out BOTH batteries AND vaporizers though. Mix and match and keep track because I talked to their customer service and they said that having a bad vaporizer or battery in the pack isn't that uncommon.
My Tornado should be here today... I hope, and I'll hopefully be done with the battery shuffle that I've been forced into because of the BluCigs. I can't wait to get something that'll finally be a viable replacement for analog cigarettes.
EDIT: I about forgot the shipping... terrible. They use another company it seems to route through to USPS. Because of tracking, I was able to see where my e-cig went in it's 5 day trek here. I'm in Nashville... the thing left Florida, went right on past me to Memphis where it sat for 2 days until tracking was transfered to USPS, and it was here 2 days after that. But I live RIGHT off of 70... it went right by my house on it's way to Memphis (for some unknown reason). Had they just shipped straight USPS, it would've been here about 3 days quicker. Plan ahead with your orders if you decide to keep order carts from them, you'll want to order about a week in advance. For me, I just went to Johnson Creek's site and ordered their e-liquid sampler and it was here in 2 days... I've been using that to refill carts.