A fair few hours life on a full charge, never had one go dead on me during play time on a full charge, thats for sure. And i've always been one for forsight, if i were buying a console now i'd be skeptical of a 360 or a ps3 mostly because of the 360's rrod-isms and the fact that the ps3 has regressed feature wise since its come out.
I was glad i bought my ps3 when i did because the model i have now is the one that is most sought after given its practically the most bulletproof one, features wise.