Really good watch, would watch again, and can recommend.
This is completely a, "You know what would be funny...." type movie, and it is done really well. There may very well be some comedy sketch writing here, but everything is strung together rather seamlessly that you don't really notice that aspect.
While Tommy Lee Jones is a fantastic straight man, the girls play it up really well. This is wonderfully casted, and they found ladies that can hold their own against such a veteran actor.
Of course the plot is fueled by stupidity and ridiculous scenario so there is a lot to laugh about, but there is a heavy amount of dark tragedy creating the foundation of this story. Weirdly they manage to leave out the "lives in danger" aspect of story for quite a while, but keep the silly through until the end of the movie.
Not going to be the funniest movie ever, but it has held up surprisingly well over the years.