I have the msp 180 and they are very durable. Besides a few cosmetic blemishes on the top sheet (which dont even really matter) they have been rock solid. Their durablity is only outmatched by the incredible performance in and out of the park. Best ski I have ever owned for any aspect of freesking. (I have owned dynastar, salomon, skied on scratches and lines)
^^ I've talked to people who have skied on pocket rockets for 3 seasons and had no problems with the core. its just the 1080's that have the shitty core