There are some pretty good statistics supporting W&W as a strategy.
Facial Nerve Preservation near 100%, Death rates near 0%
However hearing loss is a common side effect of being in W&W as well as increasing balance issues.
With that said sometimes the hearing and balance nerve are both destroyed already, so your symptoms wont get worse.
For me W&W would have driven me batty... Everyday my hearing was getting slightly worse, the head was feeling stuffier, and more like a bobble head doll. I certainly felt like I had to do something..
My doctor recommended W&W and I chose to treat proactively. I am pleased that I did.
Mentally getting it treated now was empowering, I was in charge of the tumour, and not the other way round.
Every symptom I had after treatment was a symptom on the road to recovery, versus another symptom towards deafness and a possible operation or more uncertainty as to what an AN could bring.
There is a lot of good medical literature and the advantages of W&W. While it takes into account the possible physical effects of W&W it does not address the mental effect of being in W&W. While statistically its a good strategy, its not for everyone