Not accurately Rated 2 out of 5 stars

It doesn't accurately resizes your browser to the resolutions..

For example.
This won't give a horizontal-Scrollbar on a 1024 screen which is Maximized:

But with the Resize tool, you get browser borders so the div doesn't fit which results in a scrollbar..
To test accurate, change your own screen resolution, that 100% accurate, instead of 98%.