I have the Ringke Slim, and as I mentioned a few posts ago that this case is almost non-existent it is so thin... It's crazy thin, and there is no overlapping front lip, so you see the entire front face of the Note 5... It's well done if all you want is to protect the phone from scratches...there is absolutely no drop protection... I prefer a clear crystal case to show off the handsome glass backing of the Note 5, but this case is nice if you want the minimalist of cases...
My plan is to get the Spigen Neo Hybrid... It has a clear back to show off the back of the phone, plus has a nice TPU bumper for some drop protection for small/medium drops... Also has nice metal buttons so you have positive feeling buttons, and a nice lip around the screen for when you place the phone face down...