This oven was a replacement for it's predecessor we had for over 10 years.  When that one died I looked for a a new model that was close to the same as we really liked our old Panasonic. Newer models have replaced the keyboard with a dial that seemed pretty funky to me and some reviewers.  Then I hit on this one.  1250 watts, same as my old one..and a keyboard.  Reviews were mainly good.  This review is early so can't speak to longevity but after a couple days I have put it through it's paces.  First I found how much more quickly it cooks familiar items than the old one.  It also has some new functions and the old function of reheating and cooking by sensor.  I did not use that on the old one as I found it never did the job right.  Better by trial and error with the timer. This one didn't do any better on things I have tried.  But I am enjoying the power that had diminished over the years on my old one and the unit is sleek and good looking in our kitchen.  I hope it will have at least have as long a life as the old one but I also understand most of the new stuff is designed otherwise.  We'll see.