larger installations

Has anyone deployed more than a couple of these at a single location?

We were looking into the possibility of deploying 24 of these phones (with 6 bases). Buying the extra base (the way I read) means that all handsets can be on a call simultaneously. The 1 meter separation will be problematic, but probably less so than running new cabling. The 24 phones will be clustered together in the same room. Can an install like this be expected to run reliably?

Thanks