The movie is far from perfect and I certainly didn't expect much from it, but I found it to be quite enjoyable. Yeah, so it's basically Moby Dick in space, on a low budget, with an underdeveloped script and questionable acting, but I didn't go in expecting Lawrence of Arabia ... and compared to some of the sci-fi-dross out there this one is not too bad. I didn't really like the sudden slasher element introduced towards the end - that was weird and underexplained, and didn't fit in at all, but overall I liked the movie.