Slides- Important stuff AND what they don't tell you.

I've had slides for the last 15 years and never had a problem. They do warn against using them partially out but we often put it out for lunch breaks on the road. They don't want you stepping on the unsupported edge.
As far as being able to use everything with the slide in, that's just not important to us. It's only a matter of pushing a button for a few seconds and they're out or in.