My previous combo unit was a GE and it lasted 18 years (got in Jan 2002).  So naturally I looked up GE again.  Very happy so far.  Got it installed about the end of April and I bake ALOT,  so oven is getting a real work out.  And I'm learning to cook with a convection oven.  Easy to learn the new selections on micro wave and oven.  Fit in the currect wall space just as the specifications said.  Old out and new unit in within 30 minutes.  Very happy with purchase.