Before moving to the Phone version of Coldbore I ran it on a Trimble JUNO, and of course it reads the Kestrel feed (4500 series only) and GPS data. It's much better than FFS because you don't need to "teach" the software what units the data coming from the Kestrel are. The software automatically decodes the data even changing the data units in the Kestrel in real time! Having said this, bear in mind I didn't use it much because the pairing is a battery killer and you don't really it that much. Take a hard look to the Phone version too. It's super fast and does GPS and targets too.