Keep trying I had it really early for some reason I could of downloaded it about 4 days ago but left it because of everything I was hearing about the bugs but I finally downloaded it last night.
Yes I can see a different myself. I use the raw app from Samsung galaxy store too. Just swiping and going through the phone is so much smoother it's just that sometimes now and then when you get that stutter coming out of a application back to the home screen that lag Samsung needs to fix it. It's been there for years now doing that.