As Kirk mentioned, the FuelScan gives me a much more comfortable feeling when flying the 150/150. I typically see 7gph (unless I'm flying with Poobs, then it is about 4gph, while doing S-Turns, while the flaps are down, with the doors open, hanging on the edge of stall) and can feel better about stretching my legs a bit. I don't challenge the fuel envelope but I don't get as nervous as I used to.
...shut up...