According to a friend who has them already, more stable flight and 2 more minutes flight time.
They look and feel much better than the standard props. Had Tiger Props on the P2 as well and am really happy. Hopefully on the inspire too..
I don't think so - The Tigers' have a steeper pitch and a larger surface area which means the motors will work harder to turn them since their frictional air resistance is higher than the stock props. This will mean a higher current draw on the system resulting in LESS flight time not more.
Additionally, if the clearance between the prop tip and the gimbal is lessened you run the risk of the gimbal shifting in flight and fouling on the front props.
Finally, the Tiger props are far stiffer than stock and you will see an increase in jello since they are far less forgiving than hybrid props with a little flex in them.
It's your Inspire though..... so enjoy.