I had an old Sharp, bought it sometime in the early 90's, gave out after about 15 years. The next one was a Panasonic, died within 2 years. The current GE built-in in our kitchen has been fine for the past 4 years.

Never, ever, buy a multi-appliance (oven/microwave/cooktop) if you can help it. One of them (most likely the microwave) will break and repair costs are not worth it. Dual ovens usually use a single control panel, so breakage there is expensive.