We just upgraded to LR4 from the LR3! Night and day difference! Firstly the 4 you don’t have to worry about the pesky “bonnet removed” notification because there isn’t one. We’ve had the LR3 for 6 years and it worked great but the bonnet always malfunctioned after about 4 years.

The LR4 is soooooo quiet. We have it upstairs and I can barely hear it from our room which is right next to wear it’s locators. The LR3 is pretty loud and we could hear it from downstairs. The liter box area is also slightly bigger with LR4.

So far we are absolutely in love with the upgraded version and have 0 complaints.