Not bad
The beginning of the movie was awful. Like other posters have mentioned, the acting was horrendous. Usually I don't say that, but it was pretty clear in this movie. The conversation the girls had in the hot tub was totally forced and unnatural. In real life, girls talk over one another, they don't take turns agreeing with each other. After that though, the movie got better.
The plot is actually pretty solid. There are 2 twists along the way that are rather unexpected. Without these twists, the movie would be pretty dull. The acting improves throughout the movie because it doesn't involve 5 girls sitting in a circle talking to each other. Now they're stranded, they have to decide what to do next, etc. They handle it the way you'd expect.
The majority of the movie is filled with shots of the girls' legs, stomachs, cleavage, etc. That's enough to keep the men interested lol. All 6 girls are ridiculously good looking. Lots of shots of them in bikinis and skimpy outfits. I thought it was funny that they all brought like 2 changes of clothes on their picnic. I'd have been more concerned with adequate water for a hot afternoon lol.
Overall, this movie wasn't so bad. The preview I saw made it look pretty hopeless. I decided to watch anyway, and I don't regret it because this movie definitely gets a passing grade for its genre.
Tomorrow's just your future yesterday!