My first impression is fantastic. I was a bit skeptical about purchasing as I didn't know if there would be room for additional sides of my Naga Trinity but there is! The case is big enough, pretty tough and looks like it will hold up well! The zipper works well (I've always been told to run the zipper on the fly a few times to see how good it is and this zipper didn't sag or sag and was very smooth). When installing the mouse, the case seems to put some tension on the cable (at the front of the mouse), but I don't think it's enough to cause damage. Overall I'm very happy with this case, as long as it holds up over time this is a 4-5 star purchase. Update: I've had it for a while and it's holding up great and doesn't cause any mouse issues, it even has enough room for an extra cable and Xbox controller dongle. I use it with a Razer Naga Trinity and this $15 case is worth protecting an investment of $50 or more. 4.5/5 just because there are some design elements I could tweet a little