I had a WAP about 8 feet from a ZM24 and it worked.  I moved it about 20 feet away and it worked much more responsively than I thought it ever could!

I've got another job where the ZM24 was in the basement with no WAP near it and I could not get the remotes to work reliably when standing 2 floors directly above it.  In our office I have an RM433 and a ZM24 sitting right next to each other and when standing in the theater the 433 T4 works flawlessly and the T3VZ skips commands.  It's still nowhere near the 433 range in my experience.

I'm about to put 2 into a ~6000 sq ft house and I'm very interested to see the range.  I'm going to spend a lot of time with testing and placement and I'll post my findings here.