Yes, it's not the best film ever. I'll start off by saying this.
It is however, one of my favourite kinds of film. A brainless one.
With the simple plot of "bad stuffs goin' on", shortly followed by "Lara must stop bad stuffs". Really, that's about as advanced as the plot ever gets. But that's not a bad thing, it keeps the film shallow, and easy to enjoy in a simplistic way.
I think most people have assessed Angelina's acting, so I'll say this: Chris Barry plays an amazing butler in the film, and the film really has it's funny moments. There aren't loads of them, but they are appreciated. Additionally, the film really captured the feel of the games in terms of terrain (aka tombs).
For a brainless, yet ultimately enjoyable film, I'd say this one definitely fills the quota. I'd also say it's a lot better than most people give it credit for.
For the price, I'd say it's a bargain.