Originally Posted by DuctTape
I use an integrated net.
I treat both the hammock body and net with permethrin so I don't deal with bugs biting through anything. Besides the reasons already stated by others, I use it all year round. I never have a time when I "don't need it". Even in winter it traps a significant amount of heat. In the fall/spring this is even more noticeable as when you unzip it, you can feel the rush of cooler air. This allows me to get by with a warmer rated quilt in colder temps. I also like to have my tarp flipped to one side so I can see the stars but ready to stake out at a moments notice when the weather changes. The net stops leaves, pinecones, sap, squirrel doodoo from landing on my face or quilt.
+1 to all of what Duct tape said.
I use a HH Explorer Deluxe, with a 2QZQ mod #4. I can completely unzip my net if I choose to...but found I've never opted to do so. During the spring/summer/fall...it keeps the bugs out. It also keeps the cool breezes out during the colder nights.
I too treat my hammock with Permethrin, and have never had a bite through the bottom that I know of.
I prefer it all integrated...no worries about forgetting it at some point when I really need it, and the mod lets me 'get rid of it' if I don't.