I bought four sleep sacks. One for each member of my family to use in hotels. I was very satisfied with them. I even used my body pillow inside the sleep sack and brought along a small throw to use as a blanket for cool evenings. Just place your blanket over top of the sack while you are in it. I especially liked the feel of not having any contact with the mattress or hotel sheets. The pillow pocket is also a very nice feature. I don't see the big issue with having to slide in and out of the sack (no zipper on the side). I didn't have a problem, but I guess if you are a much bigger person or elderly it may be a little more difficult. Just lay the sleep sack on the bed and then attempt to get inside of it. Brings great peace of mind when traveling!