as for their longevity, mom put a few in my living room lights a couple years ago. they're lasting fine. i just can't stand the farking light they make. i can't put my finger on it, but it's not something i like.
i installed an LED bulb that i got at home depot in a light in my room. it says it's equivalent to a 40 watt incandescent......to me it seems brighter. nice white light, and full brightness instantly. i'm going to pick up a few more of those.