I've owned the Ballistic Nylon Turbo since day 1 of release, and I carry (the phone) naked, with a tempered glass screen protector. I just don't like cases if I can get away with it. I've dropped my phone like a bad habit so many times, I'm embarrassed to admit it -- more than any other phone I've owned. Not the fault of the phone mind you; I find the BN Turbo quite stable in the hand. I'm just getting clumsier as I grow older. Two times I've dropped the phone have been so severe that I really cringed, and and in both cases, the tempered glass took the damage (
the first drop, big time).
The second drop, I got some barely noticeable damage on two corners of the case itself (concrete driveway). The tempered glass on that one suffered a minor chip that most folks could live with, but I eventually replaced it when a sale popped up.
TLDR? This unit is a beast, but I definitely recommend
a tempered glass screen protector. Which one? Search the forum. You could almost write a novella on the subject. No matter what product you pick, you'll find negative and positive experiences. I've been very lucky in that I've been able to pick up excellent deals from Xtreme Guard (probably the cheapest you can get when they have a sale going on -- under $7), but user experiences on this product are mixed.
Short version: get a screen protector of the TEMPERED GLASS variety and go caseless with pride.