Whats wrong with the E-Cig?

Alright so I am a heavy smoker.. Or should I say was a heavy one. I started smoking the E-Cig (Phoenix Vapor) about a month and a half ago. I haven't needed a cig since I started smoking that, I feel better, breath better, I can taste my food (been smoking for 25 years so that's new to me) I have way more energy ( probably from the better nights sleep) I don't even wheeze anymore. So I guess the question is what is the catch? What are bad about e-cigs? I have done some searches on the net but haven't found a credible site in either direction. Anyone know? I would love some credible research sites good or bad if you know of any.