Great review of a great product. I have two points to add.
1) The first container of wheel sealant I received came in the summer. It was a thick liquid. It went on somewhat too thick seeing as it was a liquid. However, I got some more this past December in that great giveaway thing and noticed it was more like a paste wax. I went out and looked at my old container and what do you know...it had solidified more. Apparently this stuff will "melt" somewhat.
2) Per our local expert detailer, I have started putting down a base coat of a something like Klasse AIO prior to the wheel sealant. It seems to give slightly better results.
I cannot say enough good stuff about wheel sealant. If you have not tried it - try it and you will be hooked!
-GT