The measureable advantages are unquestionable and well documented already, as well as some of the pitfalls .... but not everything needs to be judged scientifically.
For the frequent users the benefits are a no-brainer. There are also people who prefer to do without it. Scientific confirmation or contradiction is unlikely to make a difference to either.
Based on my experience as a player in the game I'd say that the "yay" population is growing, but you have to decide for yourself whether it works for you, with your hardware, in your room and according to your preference.
I'm the author of Audiolense, btw.