TW Graphene Flex Wax and TW Seal and Shine (old version) have been considerable disappointments for me.
Flex Wax- I have applied the Flex Wax (1-2 sprays per panel) using both a square mf applicator and and it was always a streaky mess, regardless of the amount of product I used, ambient temperature and humidity, and tc.; tried a LC coating applicator, but experienced the same results. Flashed/dried way too quick and I always had to use the damp mf towel recommendation to remove which, combined with the effort trying to remove with a dry mf, is too much towel contact for freshly-polished paint for my liking. This product was just generally way too user-unfriendly, to the point that it was almost as bad an experience as when I used the first version of Blackfire Crystal Coat. To top it off, the protection was visually non-existent after about a week and it looked like nothing was even on the panel, if judging by the slow water sheeting. I made the mistake of purchasing two bottles of this stuff and Pepboys is refusing to accept a return for the unused bottle without a receipt, so I am stuck with it.
Seal and Shine- this had decent (nothing that stood out) short term water behavior and protection like all the YouTube videos and internet reviews and whatnot. However, under real world conditions for a car that is not garaged, is sparsely driven, and is washed bi weekly it looked like it was barely present after a month or two. When I performed my annual detail to the car I applied S&S to a panel of, I applied several other products on the other panels at the same time and they are holding up much better. I will concede that I used the old version though and that the new version may be better.
These are just my real world experiences.