No trouble with the push buttons on ours. Only thing that happened to our last Panasonic was I noticed a strange sound and when I looked inside while it was running there was strange arcing going on in the top of it and then an odd odor. I think the magnetron went out. But what I like about them is it's the only brand on the market that can actually vary the power output not simply cycle the magnetron on and off. Don't know how they do it but of all the ones I have tried they're the only type I trust to do the job at hand correctly. Plus the sensor cooking works well too. I.E. I use it to make potatoes a lot. I love baked taters but hate waiting for them. So I put my taters in there. Set it to taters. No need to guess their weight or tell it how many. Only it has potatoes in it. Whether it's one or 10 does not matter. Set it to potato and turn it on. Voila every one is done correctly. I then take the taters, toss them in a little S&P, and olive oil (sometimes a little rosemary or thyme as well) and they go into my hot grill for a few minutes and I have perfect nicely cooked insides, crispy skin. I would buy another Panasonic JUST for how well it does that one function LOL