[DRJDVM's '69]

I think the issue is that it adds one more area of complexity....with more complexity comes more ability to screw it up and have problems...or just more work to install etc, so for some people it becomes a PITA.....

If the added work doesnt bother you and you do it right, the system works fine.

The systems themsleves work great....and its a matter of what you are looking for...do you want the flexability of variable heights or do you just want "install and forget"