I have the Ikea Hemnes daybed too. Every once in a while I have overnight guests, so it's nice to have. It's in my fabric stash room so most of the time it's piled with totes of fabric. When guests come, I move the totes into the sewing area next to that room.
That room has sloped ceilings, if it had regular ones, I'd opt for a murphy bed instead, one that you can fold up against the wall when not in use. My friend has two murphy beds in the downstairs family room, she has grade school age kids, and it works great when they have friends/relatives staying overnight.