Tossing and turning not so much a big deal, I have to turn a lot due to back injuries. The getting in and out though, is a minor inconvenience just cause there's more fussing you have to do to get your body back down into it. The inconvenience is that it takes a smidge longer to get back out. And if you're having a great feeling of urgency to urinate, ya know, you won't appreciate those additional seconds. But that's mostly it.I was wondering if they are a pain if you have to get out of the bag in the middle of the night or if you toss and turn while sleeping.
I agree it does twist. Not so much if a big deal on my end. Once you're in, it ends to follow you more than completely twisting.I use a Sea to Summitt Reactor Extreme. I backpack and camp with Scouts a couple times a month and always use a liner. It definitely keeps my bag clean and provides extra warmth when needed.
It does tend to twist and bunch up if you are a side sleeper or toss a lot at night.