I replaced my original 1/3 HP model which worked for 14 years until one of the blades broke because a metal object fell into it. After removing the old one and cleaning up I followed the instructions and the only problem was the weight of the unit while attaching it. I used an old cardboard box to support it and everything else went as planned. It is very quiet compared to the older model.
Our old GE died after 7 yrs used. I got a same one to fit into the tight space without having to adjust the pipes. After watching an YouTube video about I atalation, I removed the old one and installed the new one by myself! Very easy! Btw, I m a 40 yr o female. have no experience in pluming or other related experience. i can tell you it was so easy!!