I use the cover all the time, especially in sub 40 temps.

Only time I don't use it is temps above 60 and when I am using the net.

Yes, I too like the open feeling so I leave the top unzipped snd flipped over the ridgeline, but when it's time to sleep, the wind block, the extra warmth and keeping out of that pesky early morning sunlight, they are all good reasons to use it.

Don't regret buying it a bit.

And, it zips right off for those times I want a minimal setup.