It wont block wind, that would compromise ventilation and lead to condensation.
It will be prone to rain splatter and spray intruding on your sleeping area, especially near the front corners where the beak is attached and there is no overhang.
Rain will run down the mesh, and if you touch it, you will get wet, or your groundcloth will, or your sleeping bag will.
It is a small shaped tarp, with a little bug netting attached. You must be comfortable with water dripping or running only inches from your gear.
The netting is fairly durable as a floor, and protects the cuben or other lightwt groundsheet somewhat.
It has fixed guyline lenghts, and shape. It doesnt adapt well to non-flat surfaces due to this. It doesnt raise or lower well either. You can accomplish a bit, by wrapping the guylines around the stake to effectively shorten them.
The tarp is only a couple inches from your face in lying position unless you prop up the guyout with a stick for more room, like the extended version does.
The shape at top where mesh is under tension, and the zippers dont work well together. It takes two hands to work the zippers across the curve at the top, which you must do to get the opening open to go thru, and to close again. I left a gap one night recently, and had a mouse come in mine . They can climb all over the mesh very very well.