For safety research purposes, look at the work by the cardiologist and research fellow, Dr Konstantinos Farsalinos (he did great research on, amongst other things, the dangerous use of diacetyl (very bad thing) and flaws in some of the more emotively reported research).
For advocacy and critique of large industry and commercial involvement in legislation (sort of political, I guess), look at the former director of ASH, Clive Bates (he has a blog called Counterfactual).
For bias, look at, well, you'll find pidgin research and the abuse of logical fallacies from all camps in the vaping debate, so google is your friend.
Always look beyond headlines and check credibility of references. The bottom line is that vaping is considerably safer than smoking but in no way should it be considered "safe" (and I'll not be as crass as comparing it to say, two trips on the tube in London and saying it's safer or more dangerous...) - you are, after all, breathing in chemicals that you wouldn't naturally.