Really useful. Otherwise, trying to have a nap or even to sleep in a hammock without a bugnet is pretty impossible, there are always any fly, mosquito, bee, wisp, ants, and many other bugs whose purpose looks to avoid you for all means to have a relaxing nap 😅.
So, definitely worth to have the bug net.
It comes with a rope to hang it on, which has reflective spots in order you can see it during the night and avoiding an accident. Those "small" details tell a lot about the quality 👏😊.