This is from my review I wrote on XDA Developers:
I've never owned an Otterbox before because I couldn't get over their clunky design that hindered the user experience. The Symmetry series is their thinnest least intrusive case from my understanding. Otterbox used a 2 material molded design which allowed the case to be 1 piece for ease of use. This design leads to the case having a different structure than your conventional hybrid which is usually a TPU/silicon bumper with a polycarbonate/acrylic back. Here the case has a hard plastic (not sure what type) back half with a high density silicon/TPU front half and core. The pictures below will show a better representation of what I'm referring to. Like many heavy duty cases this one doesn't provide a lot of grip for some absurd reason. Now, make no mistake this case is still quite large and clunky, but in a more mild mannered way than its bigger sibling the Commuter (or for some other phones the Defender). There is a subtle texture on the back that all Otterbox cases seem to feature, but as I mentioned don't expect a lot of grip from it. I enjoy the feel of this case, even its large size aside from a big downfall that I will talk about below.
Ports: The micro USB port has no issues fitting cables from any of these manufacturers: Tronsmart, Choetech, Samsung, Nvidia, Motorola, Aukey, and Anker. If you have large & studio style headphones with a massive aux cable you won't be happy with the normal sized cutout for headphones, but it works fine with my Bose QC 20's, Freestyles, OE's, Samsung headphones, and some others I've tried. All microphone cutouts are also present. Since Otterbox is the so called "king" of rugged cases they have huge cutouts to match their reputation. I can see more accessories potentially working with this case due to the large openings which I appreciate. There is a little loss of rigidity on the bottom due to the number and size of the cutouts, but it shouldn't hinder the protection it provides.
Volume/Power buttons: I still don't know why manufacturers especially big names like Otterbox can't make tactile feeling buttons! A lot of companies like Speck (their Candyshell), or even UAG seemed to have mastered this area despite not being as well known. I can't make excuses for the buttons on this case; they are so hard to press the whole side of the case physically moves a large amount just to press any of them. I was really looking forward to using this case when I go hiking due to its rugged nature in a slimmer profile, but not with buttons that need the Hulk to move. This one area is what will make or break a case, and it certainly ruined the case for me. I ended up returning it to BestBuy because I couldn't deal with this kind of disregard on a $45 case.
Overall: 7/10 i truly enjoyed every part of this case, but the most important part of it was a letdown: the buttons. Otterbox knows how to make an excellent case, yet they don:t know what a tactile feeling button is, or how to even ensure they function easily. If you can get over that big drawback I see no reason not to buy this case because it was set to be one of my favorites alongside the Tech 21.
I would add more pictures but BestBuy limits the uploads to 2 images.
You can read more here: http://forum.xda-developers.com/s7-edge/accessories/3-7-case-reviews-spigen-incipio-tech-21-t3331028