I bought this and installed it myself. My old one started leaking. It was very easy. Only took about 15 mins. The hardest part was installing an outlet. This was due to my previous disposal was hard wired. I didn't want to cut this cord. I also completed that task myself. It runs quiet in my opinion. But I haven't used it for anything heavy duty so far. Just normal everyday food. Looks nice under my sink. I think I made a good choice. 
*This was my first time doing all of the above.