Hey mate, I take it you like to use a floorless tent? I am the same in my Lavvu I prefer having no floor, I use a simple X leg army style bed for that very strong and sturdy, but it's not as fancy looking or probably as light weight as those ones you have in the pics, they look great. I may have to upgrade looking at those pics!
They are a great thing to have either in floorless shelters or floored tents for just that reason you stated no wet bedding if it downpours and you get run off through the tent, or water logged floors that end up in puddles.
If you are tall, try and find ones without the top and botton cross bars nothing worse than banging your head and feet on the bars when you change sleeping positions.
The most important thing is comfort, go to the store and try before you buy, some people prefer the feel of canvas beds, others prefer air tops etc.
But over all I think they are better than a straight closed cell foamy or air bed on the ground IMO.
We do not go to the green woods and crystal waters to rough it, we go to smooth it. We get it rough enough at home, in towns and cities. -Nessmuk