Has anyone used the GPS-2 puck available from Byonics with their EFIS system? If so, what setting did you use?

Here are the specs:

Byonics GPS receivers are 5-volt, WAAS enabled, WGS84, output 4800 baud NMEA 0183 serial and employ the SiRFStarIII chipset tracking up to 20 satellites.

I use one for my APRS tracking transmitter and it works well. I'd like to use it as a back up GPS with my 3500S'