We originally bought 2, yes 2 of the defective PVM9179SKSS. Both blew-up before leaving the store when using the convection oven setting. We didn't want to drill new holes in the cabinet, so we decided to give the new PVM9179SRSS a try. Well, surprise, the new RSS doesn't match the holes from the KSS. This is good and bad. Good because it is a complete redesign of a defective KSS, bad because now our cabinet looks like Swiss cheese. But, so far, after one month of heavy use, it's working flawlessly. Note of caution: use a heat shield on the back and top to prevent heat scorching your wall and cabinet. We are using this in an RV. It replaced a worn-out Frigidaire.