Well, your post got me googling and I agree with your assessment. Apparently regular gelatin will work as well but one runs into the difficulty dissolving it.
I particularly found it interesting with regards to osteoarthritis. At least one double-blind test with very positive results over 24 weeks (not the few weeks a few 'tests' run.)
The results of this study have implications for the use of collagen hydrolysate to support joint health and possibly reduce the risk of joint deterioration in a high-risk group.
http://www.ncbi.nlm.nih.gov/pubmed/18416885I might look into this (or regular gelatin added to food) after checking with my physiotherapist.
The improved sleep at night makes sense, RamblinRose has already told us to have a high protein snack before bed and this replicates that.
The improved skin is subjective but logical.
The weight loss might be credited to the no eating for 3 hours before bed but if that's the case, a quick test taking it only in the morning upon waking and then eating regularly should prove it doesn't help with weight loss. The numbers given in the anecdotal comments point to the same effect I found when I upped my protein to 25% (actually, I seldom make that so this product would be a way of doing that.)
Anyway, it is 'food for thought.'