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Full user review
"Great for side by side comparisons and copy/paste"
Ability to layout your screen with web and traditional apps in a non-overlapping fashion so apps/web sites don't get hidden or clipped.
Dragging and dropping content from panel to panel is very useful.
You need a good sized screen or high resolution display. Minimum display resolution is probably 1200 pixels wide.
Great application for people with good screens.