I purchased the S-View as well when I got my S5
At first I loved it!
-It's sleek, professional looking IMO
-Screen protection is great
-The case stays shut like its supposed to
-Quick access to Camera
-Easily view text messages
After about a week of using it it became more of a PITA to use than anything.
-Lack of drop protection, but that's a given
-One handed use is frustrating
-No real customization to S-View screen
-I am a heavy email sender/receiver for work and I could not find a way to view email notifications on the S-View
-Inconsistent proximity sensor reaction. I would have to open the case to hang up the phone half the time
-If you flip the cover around to the back of the phone occasionally it would put the screen to sleep
-Any pictures taken while using the camera with the cover closed get saved to a separate folder within the device's storage
-Unlike the S5's screen the S-View screen would collect finger prints like crazy and I always had to clean it off
Just my 2 cents. I went back to Sprint and returned it in exchange for the Otterbox Defender and have no complaints so far!