I re-applied this to my windows at the weekend. It seems to get better as you layer it up (last applied it about 3 months ago).
I don't bother with the white cleaning cream anymore. I did it the first time but that was it. With the sealant, I leave it on for 10 mins and then use a wet paper towel to remove it otherwise it's virtually impossible.
Once i've been over the windows with the wet towel, I use a clean MF to buff off any water marks.