me personally I like the ability to switch to reserve once the main is out.
This at least lets me know about how far I have left to go.
I had a 1300 and like their set up better.
I can't stand the idiot light on the 1800 it comes on with about 3 gallons gone on my bike
and I have never tested to see how far I can go after that, plus there is no switching to reserve so if anything goes wrong your SOL.