Hey Joelseph, I returned it because it was a little difficult to put my Air in and out. Did you get it for the 13" also? I felt like the flap required stretching it in order to enclose the Air after sliding it in, and in order to open it to slide it out. So 1) it's a bit cumbersome, and 2) I fear the material will stretch over time with a lot of usage. It's a nice firm fit, but when carrying it, I can't help but feel the texture ripples slightly. It didn't give me a comfortable grip. I think this will be true with most neoprene sleeves (but I confess this may be a bit of nitpicking. You may feel differently holding it).
Having said that, the sleeve was thin and light and I did feel like my Air was protected from scratches and whatnot (obviously wouldn't do too much against a drop). I just wanted something that had an easier entry point, and a bit of a firmer material. Also, despite it being faux leather, the one I replaced it with looks slightly more professional.
Hope that helps in your decision.