I bought this to replace the non functioning speaker cone in my Aguilar GS112. Huge weight difference compared to the stock speaker, these are much much lighter. May not seem like much but if you're lugging speaker cabinets around a lot this makes a huge difference. A significant difference between the two.
The sound is incredible. I have another GS112 still with the stock speaker and this sounds just as good. It's a bit hard to be objective as the stock cabinet has a tweeter, and the one with this replacement doesn't. But that being said, this cabinet sounds amazing, matches with my other one perfectly. I have even gigged with this cabinet on it's own when I don't want as much of a modern "hi-fi" sound and it sounds perfect.
Very easy to install. Very good sound. Has been several years now and I haven't had any issues with this speaker what so ever. Highly recommend as replacement speaker or even if you're looking at building your own cabinets.