If I use the slip bag for the night, I prefer my little course, a shell, since it is a little chilly but otherwise only in the body.
The bag does not smell when unpacking for chemistry and is pleasantly soft.
I washed it right at 40 degrees and put in the dryer, it has not warped and was then just as cuddly as ever.
For the winter I think the bag is not suitable, but for the transitional period / spring / autumn it is thick enough.
For the price a car / sleeping bag, I find the slip bag great and forgive it also five star.