The Hills Have Eyes was fantastic and had everything a horror movie needs, a tight story, good acting, creative death scenes and characters you actually cared about when they started dying.
The Hills Have Eyes 2 was not as good as the first but it was still great, some of the scenes were extremely graphic and unnessecery such as the birth scene at the beginning but there are few of them and the rest of the film makes up for them, my favourite scene being when a mutant cuts a blokes arm off and waves to him as he falls to his death.
The boxset is a great buy, ignore what other people say and listen to me, buy it now.