I used it on my most recent Vienna Lager (it is the recipe that I brew consistently... and use as a barometer for new processes)
What I found in a sample of one is.... when I transfered from the bucket to the keg, I had essentially zero haze and stuff settleing out. (I usually have half of the first pull from the keg have some stuff in it.. then it is clear after that)
Taste wise, I found it be no different and no effect on mouth feel.
I picked up two or three more vials to try it on a few batches in a row and see what it does on a consistent basis.
Do I think it is worth 2 or 3 bucks a batch? Not really compared to Gelatin. Do I think it works with no noticeable effect. YES!