There isn’t really much that I can say about the FlexProtect Case for the Galaxy S5, other than the fact that it is the thinnest that I have ever seen. Sure, I have already said that before, but it really does keep the scratches away from the back.
As for the HD Clear Screen Protector, it protects. I’m not certain what else that I can say about this, but you need protection for the front of the phone on the touchscreen, so you should use this.
If you have a Galaxy S5, and you are looking for an inexpensive way of protecting it, then I will recommend this package. You can purchase the Samsung Galaxy S5 FlexProtect Case + FREE HD Clear Screen Protector for about $16.95 on the Tech Armor site.