I use that all the time. I have so many friends who just give it however long it says on the packaging and then complain their microwaves suck.
The only thing that can still throw me off course is when the packaging says: “microwave for about 7-9 minutes depending on your microwave”. Bro, what am I supposed to do with this information? I’m ready to go watt for watt, I don’t want to keep an eye on my microwave. I just wanna hear the bing and know it’s done.