we done it both ways and even though we've had issues with our wall slides on our current MH we still would rather have them than not.
most of the issues we've had are related to encountering missing pavement on a narrow 2-lane country road in Alabama a few years back. we were running about 15-20 mph and rounding a right hand curve. at the apex of the curve I saw that the right half of the right lane was gone. the section of missing roadway was 4' wide, about 20' long and 7-10" deep (best guess). I hit the skids but could not stop. we rocked twice which broke the resi fridge loose dropping against the opposite counter. I thought we were gonna tip over.
some damage to the slides was immediately found but some did not materialize until a couple of years and many open/close cycles later. despite all that we'd rather have the room than live in a hallway. no leaks or other issues.
