Going from a 0.9 cu. ft. microwave to a 1.6 cu. ft. microwave was a HUGE difference, but we love it.
This microwave works wonderfully. It heats items very quickly and does exactly what it is meant to do.
This is a very large microwave, a bit larger than I was expecting actually, but it fit on the counter without issue and after using it several times, I am extremely happy with the purchase. 
The only thing I would change about it, would be to make the finish alarm louder. Its fine if your standing in the kitchen with it, but impossible to hear from the next room.