I bought a pair of these to have the option of putting my toddler granddaughter in bed with me if she should wake up frightened during her first overnights away from home. When she grew out of the portable crib, we put her to bed on a full size mattress, one side at the wall, with one bumper on the opposite side, and one at the bottom (only tucked under the bedspread). She’s never fallen out, although she has a habit of wriggling her head into the bumper at the top of mattress. On vacation last summer, just before her third birthday, we installed one on a twin bed that was bordered by a wall on one side . No fall outs there either.That was the good news. Unfortunately, this bumper style has some practical issues. They’re quite long, and have some weight to them. They did not arrive in the so-called carrying bag; it was folded into the package. There’s absolutely NO WAY they will fit in this bag. I used all my cushion cover stuffing tricks and just barely managed to get one into it. The bag is useless, IMO. Without something to contain them they’re quite unwieldy, and take a lot of space. Because they are hefty enough to knock things over, even moving them puts your lamps and other items in your path at risk. I finally settled for folding in half and securing with bungee cords, for storage in extra large clear plastic bags. A good place would be under the beds, but I don’t have enough free space left there. Until I get around to a long overdue de-cluttering, they will continue to be shuttled between bedrooms when not in use.They are a bit expensive, IMO, but worth it if your child sleeps away from home frequently. (I paid $39.69 for the pair.) Take away the storage issues and I would give them 5 stars for serving the purpose. However, I’ve subtracted one for the useless bag. When I was shopping, I think one picture showed a mommy model with the bag hanging neatly from her shoulder, ostensibly stuffed with bumpers, a misrepresentation. To be fair, this may in fact have been a different brand, but it would have been as useless as the one I received.Finally, the smell was slight and tolerable after I washed the zippered covers. They have non-slip material on the bottom. Whether you mount it before or after putting the fitted sheet on, it’s not as simple as represented. If you have only old-style fitted sheets you’ll have trouble placing this bumper at all. In recent years I’ve noticed fitted sheets have become very tight, even those made for deep mattresses. It is rather difficult to get the bumper under and situated, but I can manage it by myself, and it stays more or less where I put it all night.Summary: the bumpers serve their intended purpose well, but the bag is useless and storage is a problem.