i've had mine for almost a year. i did have some minor problems with it...it would freeze occasionally...but i just took it to the apple store and it was because i stored corrupted data files (i use my ipod as an external hard drive also). problem fixed. otherwise, it works great. battery life is good too.
i love my ipod, but i notice that scratches are much more noticeable on the black surface.
you should also consider that you are paying an extra $30 bucks compared to a regular 20GB. it might be worth it if you plan on getting "The Complete U2" from iTunes, but if you already have everything that U2 has ever recorded then i don't know.
i doubt i'll get another u2 ipod...i'll probably get a nano or shuffle or whatever new generation of ipod there will be in the future.