I have to say that Skyline was probably my bigest movie let down of the year. The trailer promised so much, but the final product was awful.
The acting was wooden, the script was painfully cheesy (and there's cheese abound in this movie, but not in a knowing way... just really bad cheese that stinks).
The plot was non existent and the ending was probably the most ham fisted "run out of budget" calamity effort I've ever witnessed on the big screen.
I reccomend you really don't spend a moment of your life watching this TV movie with a budget.
The best bits are in the trailer.