OK, been playing with this for a few days now. I have the Q1000P.
It doesn't like roads with tall buildings on. The software I have (Trekbuddy) talks to it fine and gets position with an estimate of error.
Logging works fine but if you catch a load of reflections (street with tall buildings on one side) then the accuracy can be a bit off.)
I haven't really sorted out how to follow a preprepared route on the mobile phone yet but a bit more playing should get me there.
..d