It does work well! It was originally made as a fining agent, and it worked great (White Labs gave out samples about 6 years ago at a National Conference. It got rid of chill haze completely.
It was found that it reduced gluten substantially so that in may cases it reduced the gluten in regular beers to under 20 ppm so that they can be legally called "gluten reduced" in all places, and gluten sensitive individuals can usually have some. It is NOT gluten free, however, so I wouldn't call it gluten free just in case you have some celiacs in the crowd or a true gluten allergy. Some gluten sensitive individuals would be able to drink it, probably, but not all of them.
It's not the same as Beano (amylase) at all.
I did a split batch recently. It was an IPA, and 5.25 gallons got the Clarity Ferm, and 5.25 gallons did not. Otherwise, everything was identical.
Both beers were clear, so I didn't notice greater clarity (but I never get chill haze anyway), but the interesting thing is the beers were exactly the same. Exactly, totally, completely. Body, head retention, quality of carbonation, etc. You would never be able to tell them apart.