We really like the look of the wall oven, it also fit perfectly into the spot the other one was removed from.  No extra work was necessary.
Fairly easy to use and intuitive but would be nice to get a 5 minute tutorial on all the features, especially on the microwave/convection unit.   The only negative thing I'd say is the pre heating time, seems like it takes much longer than the old unit (which was also a GE appliance).
Overall, we're happy with the purchase so far!