I'd never paid much attention to the average pace display (an option you can set) up until now but as I can now get around the whole 4.3 miles without stopping for a wheeze, it's a huge incentive to be able to know that if you just keep the SR better that the last average, your time around the course will be better. Obvious! Doh.
A big point to make is this works from an impeller in the water - while this is not as accurate at measuring distance, it is the only way of getting accurate info on that last stroke. GPS based systems (even the latest) just aren't accurate enough over the distance covered by one stroke.
Loving this rowing thing.