I bought one of these on Ebay. It was pretty cheap, but you can also make them yourself. Today I tried it out. Put a Large-Med potato in it. It was not a huge spud, but not a medium one either.
I have a cheap GE Microwave from Wally Mart. It is flat out the cheapest one, and is rated 700 watts. It took 6 minutes before I was certain it was done. I didn’t pierce the potato, not at first. I nuked it for 4 minutes, then one more minute, pierced it, then 1 more minute.
Came out good! I just ate the spud, with sour cream and butter and bacon bits. Still, Microwave is not as good as Oven baked.
The thing is “OK”. But it’s not a real game changer in my book.
I got a big 10lb bag of white spuds. I want to try making Hasselback Potatoes.