Are there any issues with iTunes allowing sync with only 5 devices?

There is no restriction imposed by TPControl on iTunes regarding syncing with one or more devices, however our licensing model requires that a single device token is for use on a single device only. Refer to Can I move my licence to a new device when I upgrade it? for information on moving licenses. Our TPTransfer software can be hosted on any (including multiple) Windows PCs, and is used to transfer TP4 files to one or many devices.