Yeah I had a TPU film one on my previous note 8 and it was good. Yes it wasnt very slippery in the begining and was not fun to use the s-pen. But after 3-4 months of rubbing against the insides of my pocket it became smooth. So I agree the TPU ones are not a bad option. When returning the note 8 under the upgrade scheme, i had to remove the screen protector and noticed then that it had actually become yellow and having tried both, i personally prefer the current glass one I have described above.