I thought we had it bad! All our macbooks have applecare and I think Ive had work done on 13 or 14 out of about 16 now. Battery failures, logic boards, top plastics cracking/discolouring, one LCD. Our new iMac suite hasnt been fault free either but that was mainly HDDs failing... the most annoying thing is when they just decide to not boot etc and we have to re-image.
Generally the desktops are pretty reliable compared to the laptops though.