Someone got experiance with this?

What sounds good about multiplicity is, that copy & paste works between the machines.

Currently I'm using Synergy, not only for multiboxing but everything that I do on my pcs, even work.

But transfering files between all 4 pcs is a pain in the a..!

I think I will check if there is a trial version to test it.

I switched to Octopus and haven't looked back. It did take a night to get set up, but now that there is a tutorial I think it would be simplicity itself.