This lube is pretty awesome. It doesn't collect dirt like the wet lubes. It seems to be a mixture of alcohol (or some other quick-drying solvent) and possibly a powdered wax. It goes on wet and then dries. My chain is MUCH less dirtier than when I had used a wet lube. This seems like a plus in that it may prolong the life of the chain/cassette/cog on account of wear and tear. I really like that fact that my chain is less dirty than with wet lube.
The only problem I've seen is not a performance issue. Rather, I can't tell how lubed the chain is. I find myself lubing the chain maybe once every week-and-a-half to two weeks just to be sure that the chain is well-greased. So far no real problems.