I had the Silicone case for a while but ended up returning it. It's a good thickness, has sufficient camera protection and lip protection. I didn't like the slimy feel of it. Interesting feeling case for sure. I actually found it slippery against skin. Meaning, it would slide through my fingers or off my palm if not held tightly.
I can rest a TPU case or the Candyshell grip on my fingertips while I use my thumb to navigate, and the phone will literally not move, it sticks right to my skin.
When texting in landscape with the silicone case, I especially noticed it's tendency to keep slipping downward. I had to keep adjusting my grip to pull it back up again. I know not everyone has experienced this, but I'm not the only one. Just something for the OP to be aware of. I also wasn't crazy about the fully open button part of the case.
Thankfully Apple's return policy is your friend on this one. I gave the silicone case more than a week and ultimately just decided I didn't like it, especially not for $38 after tax.