Product review (3 stars): Test your Patience
This unit was a replacement for another one that finally broke. So the good is that it fitted on the existing open, though I agree that it is shorter as someone mentioned.

It is definitely much smaller inside,

The worst part is to understand the starting/selecting cycles. So far it takes a few tries to get it going. But the process requires reopening the door, turning off/on/off, closing the door, turning it on again, counting to 15 (sec) before pressing the start button and If we are lucky it will start, otherwise start all over, frustrating!

On the plus side it is a little bit more energy saver, at least it is what they claim.