Tried it with a FK8 and I didn't have any success getting the dongle to connect unfortunately. Could have been the OBD dongle though..
Eventually went with a Garmin Catalyst. Pricey but great set up.
Seiko Astrons are good watches. They use an internal GPS antenna to update the time daily and also to the time zone you are in. Rechargeable battery using solar.
They did a nice piece for NSX a while back.