I actually rented and watched the Battleship movie this past weekend. I must say that I throughly enjoyed it.
I thought it was going to be some Transformer spin off by stealing what they do. They didn't do that at all. They made it actually believeable that this was another race, which was like us but different in their own ways, that traveled across space from a signal we sent out to reach out to other world's. Too bad when they came it was to take over our world. They definitely had some advance technology but nothing to the extreme that we couldn't create ourselves one day.
They have the small love story in the film as well but it doesn't take too much precedence in the film. Just enough to go along with the story.
Definitely check it out if you're looking for a decent movie and don't know what to get.