I feel that the other comments made about this movie do not exactly do it justice. I just rented and watched a copy of it last night, and I feel a little more generous than some of the other posters. Firstly, one has to address the fact that this movie is highly derivative of "Signs". Basicaly, the premise is the same. Crop circles mysteriously appear in a farmer's field and trouble ensues.
The acting is about what you would expect. Baldwin is far too over the top to really appreciate, but Billy Zane does a great job, as do most of the actors that portray the college kids trying to fix up the old farm house.
The CGI aliens are not done very well and look really fake. The build up of tension throughout the movie, however, is well done. There are some scenes where I couldn't help but jump and, in general, I think that this movie actually did a better job of interpreting the possible uses of crop circles better than signs. In this movie, the circles are used as a type of portal system for the aliens to get from place to place. In terms of a further comparison with signs, the ending is a lot more bleak.
I felt that signs included a cheesy supernatural element that, thankfully, was mostly absent from this film. Don't rent it expecting to see something on the same scale of Signs, but if you liked it and the ideas it presented, you should get some enjoyment out of this as well.
