Used the Edge for the past two years on hiking and canoeing trips, all solo. Edge works well for lightweight backpacking, especially solo, where you're not spending a lot of time under there. It's an excellent piece of gear for that purpose, and I love it.
If rain threatens, just pitch it much lower to the hammock (almost touching hammock when unweighted) and you will have better coverage. In a big thunderstorm, absolutely pouring, but not blowing too much, the hammock did not get wet at all. I got the door kit, and bring one side with me, in case rain wants to blow in one end. Used it once for wind protection, but not yet in heavy rain.
My two cents, If you are going to spend a lot of time in one place, or hang out with friends under the tarp for any length of time, it's a bit small for that purpose. In porch mode, I've cooked under there (carefully) with an alcohol stove, but wouldn't have dinner party under there, you know... Wouldn't want to spend a whole day under there. Hope that helps.