I used to use it when it first came out but at that time I had a black Corvette and I found that it gave the finish a shiny but greasy look. It had great swirl and minor scratch filling ability, but that would only last a short time though.
I am hooked on Meguiar's Ultimate Fast Finish now though. It's so much quicker than using a conventional wax/sealant where you wipe it on, wait for it to haze and then wipe it off. With UFF you simply wipe it on the car with a microfiber sponge, and it goes on pretty clear and most of it will disappear and you just need to lightly wipe off the finish. I find it offers a nice layer of protection too, bird bombs don't etch into the paint and dust doesn't stick as easily either. I am not sure how long the protection lasts, as I like to reapply once a month since it's so quick and easy to do.