Ive done white rice (12 minutes), Brown rice (32 minutes), whole wheat pasta (8-9 minutes), and oatmeal (1-2 minutes) in the microwave.
Rice in the microwave, both white and brown, comes out great.
Ive tried doing rice in a crock pot (slow cooker) and it didnt come out right.
I only do potatoes in the oven or toaster oven....never the microwave