Checked Consumer Reports, online reviews and other sources before ordering. This Bosch replaced a 27 year old Kitchenaid that had been top of the market way back then. The Bosch is so quite, does amazing job of cleaning, has volumous capacity and is extremely well made. Did self install - great directions and online videos very helpful. So far, very happy. Relative has 300 model and they are happy with Bosch. For us, the upgrade to Model 500 was well worth the money. We would buy again.