Generally, without being biased, I consider Spigen to possibly be the best company for mobile phone cases, but I have no opinion on the screen protectors.
The case is flawless, you don't have to worry about the phone breaking, and since it protrudes a little on the front, it protects the screen very well from drops and even if you place it face down. The cameras are also well protected.
It doesn't slip or stick, even with wet hands. I was skeptical about the design on the back, but in the end, I like it and it has a nice touch.