We've tried a gazillion grooming products I'd say my top favorite ones would have to be CC, John Paul, Furbutter, Petzlife Cranberry Fields, MinkSheen and Petsilk.
MinkSheen is probably one of my very favorites, but I would definetly suggest anyone who is interested in it trying a sample first. We were lucky that it worked out for us as I bought a gallon for the first time trying it!
I think it works better on "true" silk coats, it seems those that have puppies or modified silk coats don't seem to get the great results the rest of us have had. A friend of mine brought her yorkie/chi mix over today and tried it and has similar results to what some people have expierenced here. The hair was all frizzy and a poof mess! I could hardly believe it was the same shampoo I used on my two because it worked completely different. The smell was much stronger too so I'm wondering if each dogs chemisty has to do with how the scent reacts just like fragrances do with humans.
I'd say Furbutter is another product that works better on "true" silk coats, My aunt tried it on her Silky Terrier and it did not work at all
As for product dissapointments, the biggest one for me would have to Cowboy Magic

All that stuff did was make Jaden and Jewelina a greasy mess and I used the tiniest dab! I think that product would work wonderfully for cotton type coats but not for silk coats, at least not for my two anyway....