I'll start by saying that I was a fan of the original 1977 The Hills Have Eyes film written and directed by Wes Craven, so my opinion of the remake is no doubt colored by that fact (come on, who doesn't love Micahel Berryman as Pluto?).
I was not so keen on seeing this movie when I first heard about it, as I'm not big on remakes (especially remakes of what I consider to be good movies), but eventually I decided to give it a go. Besides, in the worst case scenario a bad horror movie will always win out over pretty much anything Hollywood has to offer these days. In any case I went into The Hills Have Eyes with rather low expectations.
Casting - Unremarkable for the most part, though I always enjoy Ted Levine in pretty much any role. But really, who watches a horror movie for the casting?
Plot - If you've seen the original there aren't many surprises. "Family trip gone wrong in the middle of a town of freaks" pretty much covers it.
Effects - This is one area that I enjoyed. While not the best effects of the genre I think in many cases it was an improvement over the original which to be honest is expected. The gore level was about right.
Overall the movie met my low expectations and came nowhere near matching the awesomeness of the original. If you haven't seen the original and are wanting to watch this one, definitely side with the original and perhaps watch the remake for a comparison.