After I get in, I slip the open end of the bug net over me and reach up to the other end of the hammock and cinch it closed -- the cord lock and string for that end are now inside.
it's really not all that difficult, but it takes some practice, I guess. I lay on my back and manipulate the cord lock and string reaching back behind my head.
Like Sgt. Rock said, this simple design is lighter than if you add zippers, but there is a little lost in conveneience.
Today, I don't use the 360° bug net much, and have opted, instead, to use the Equinox Mantis Sleep Net from AntiGravityGear. It's a much lighter, easier system (for me) and is a snap to get into/out of. I just clip the net to my tarp ridgeline.