My health issues were the main reason I have tried to quit cigarettes for so many years (without any success on patches, gum, lozenges, drugs, acupuncture, hypnosis or therapy). The e-cig was easy, and it worked!
The improvements to my health have been huge:
---no more sinus infections
---easier to breath
---no more hoarseness
---no more wheezing
---I can hold my breath about 3 times longer than before (very important to me since I love to swim, and I sing in a choir)
---I can actually jog/run now where before I couldn't even walk down the block without getting winded. I can now play with my dog a lot longer than before, too.
And other benefits:
---I can smell and taste everything better
---I no longer smell like an ashtray
---I no longer contribute cigarette butts to the landfill
---I no longer burn furniture, carpet, clothing, or myself
Go for it -- it's truly worth it.
P.S. I don't want to start a war over which model is the best or the cheapest, but if you want ease of use and convenience, check out the 2-piece KR808D-1. I got tired of the filling/dripping/dropping stuff, so I'm grateful to the 901 for getting me off the analogs, but I switched so I could use the pre-filled cartomizers. See my signature or just browse the suppliers subforums to see what their customers are saying. Several places sell these - Vapor4Life, Nhaler, Eastmall, etc.