Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Horrible! Eggs blew up twice!

I've been using this product for about 3-4 months now.. and eggs blew up twice. Seems you have to keep with the same brand/size of eggs or if you buy another brand (even if the same size), they'll take less/more time and then blow up in a microwave. Very scary to hear the huge BOOM and extremely unreliable! After the blow up, the microwave is very hard to clean - but the worst is the top part of the egg cooker, blown up egg sticks to it and nothing will scrape it off.. i finally threw out mine!