I ordered a blu about three hours before I found this place. I was bummed out that I didn't find all the great info here before I ordered.
I waited a little over 3 weeks to get it, and I was NOT impressed with their customer service. When I placed my order (like a lot of people here) there was nothing on the website that said it was out of stock. It wasn't until I got my confirmation email that they said it would take two weeks to ship. I waited a little over two weeks, and then contacted their customer service via live chat. When I complained about the wait, and the lack of information on the website, the guy just gave me some copy and paste response. He said it would be here by Aug. 4th, and did the chat window version of hanging up on me. I will never order from them again if I can find cartridge somewhere else.
That being said, I just got my blu in the mail today, and so far I really like it. It is working well, (knock on wood), tastes pretty good, and has surprisingly good vapor production.
If I had it to do over again, I would have ordered a 510 from Totally Wicked, and I'm sure I will order one eventually.
However, a few hours into the blu and so far it seems really nice and works well.