jdmz

I came from a square taper bottom bracket on my stolen trek 1220. I now have a fuji that has the Truvativ GXP bottom bracket. From what I hear, these are really crappy bottom brackets, but I would have to replace the crankset if I wish to upgrade to something better. So far, it has given me no issues, but I have some questions about it. Are these BB's sealed? Meaning I don't have to regrease them.. just ride till it breaks. Or how should I go about maintaining them?

Any suggestions/comments on this BB system? Has anyone stuck with it, or do you all eventually swap out the crankset?

Thanks