Product review (3 stars): Seems fine so far
The last of these bulbs we purchased for our microwave (from another vendor) didn't last a year. These ones seem to work fine so far, but we've only had them in for a month.

Edited: NOPE. Both bulbs I purchased died last week, after less than 5 months on the job. I don't really know how long they are supposed to last... I don't know if it's the bulbs themselves or maybe it's just my crazy microwave? I don't remember ever having to change bulbs on previous microwaves, and this one seems to go through them every 5-8 months.

So three stars I guess, since I don't know if it's really the bulb's fault.