Don't watch twice (or even once)
I like Katee Sackoff, she's usually alot better than the movies she's in though and here is no exception.
The movie starts out reasonably watchable, albeit very slow but still has enough creepy (albeit never truly scary) atmosphere to go around.
Last 30 minutes was one big old mess though, what started as something really simple just did a 360 and became all over the place adding multiple twists changes in tone and pace and a bag of chips plus a couple burritos. Well not really but you know.
The first hour I'd probably give 5/10 last 30 minutes was more 3/10 territory.