Well, I've been using the eGo-T since around January. There's a lot I like about it but there are some things I don't. Before, I had been using mainly KR808D-1 cartomizers and really liked them, but I tried an eGo-T and was amazed at the large amount of smoke I was getting out. But over time the eGo-T started getting a clogged effect that requires some maintenance. On the other hand, with cartomizers you just refill them until they give out and then toss it. I think the eGo-T is still evolving and will probably improve, but until then I think the Go-go is a great PV. The battery is 1300 mah and is a larger diameter than the eGo battery, along with the connector being a larger diameter than a KR808D-1! Looks like a cigar. The Go-cart is a big cartomizer and is supposed to hold 3 ml of juice. I usually fill a blank KR808D-1 with around 25 drops, but with the Go-cart I put 95 and stopped! I've been using it alone for 2 days and the battery finally went out but the Go-cart seemed to be still going fine. I know we're all favoring different types of PV, but this one has really done a good job of satisfying me.