I bought three metres of this net curtain, at a drop of 36in.
They are spot-on what I was after. The stitching at the top is neat and tidy, and the tunnel is wide enough to take decent sized net rail.
The weight at the bottom is hemmed in with a slight decorative stitch. The weight itself is a lead-beading. - tiny square beads of lead. Flexible to accommodate gathering of the curtain.
The visibility through the curtain itself is fine. The mesh is what I would consider to be a fine grade. Think mosquito net, but a tiny bit thicker. - square weave with 0.05mm boxes. (I measured it)
In summary, I'm happy with my curtains.
They were cheap, but they are of such a good quality that I can see them lasting a good while yet.