Cheap bean bag chairs looking great are of course made from low quality materials that will translate into a short lived chair. If the chair is cheap enough maybe that is not a problem.
If going for a longer lived bean bag chair, it is probably relevant to look for one that allows to take the cover of and wash it in a washing machine.
Apparently many bean bags are typically too small for adults, but again that may not really be a problem if the chair is mostly bought for the kids, which it will be in our case.
A bean bag photo from the hotel room of our latest vacation that sparked the interest.