I've been using them for almost 3 years now. I bought some generic brand in a local smoke show to see how they worked out and they were great for the first few months. I slept better, my chest didn't hurt anymore and I had more energy. Yeah, it still has nicotine but comes in lower levels. The big thing is no carcinogens. The problem was since they were only found in this one store, when they ran out of refills, I was S.O.L.
I did some research online and found Blu Cigs way before they even had the TV commercials and NASCAR sponsorships. I ordered them online and eventually there started selling them in drug stores like Walgreens and gas stations like Mobil or Quick Chek.
I highly recommend them to anyone that need help quitting conventional cigarettes. I suggest ordering straight from the site though. Sometimes the refill carts sit on the shelf a while and lose their flavor. I heard the single disposable is even worse so if you buy one that's been sitting there for months, don't judge the product by it. Get directly from them if possible. I order online and buy from retail stores if I'm still waiting for my stuff to come in. They give you better deals on their site too. The more refill packs you buy, they knock a few bucks off each pack.