It is very nice for calibrating and maintaining accuracy.  With that said, if you lease a different machine every year it would be a little pain in the arse to install/uninstall yearly. For a late model case combine:  You replace the clean grain elevator chain, need to replace yield sensing pad in the clean grain tank. PP suggest you drill a 1" in cab for wire harness (you could skip this but would be tough on wires being pinched in door). Mount "brain box" on side of combine by concave shields.

Without much knowledge would maybe going with a PP drive be a better route for you if all you want is to get yield data in FieldView?  If you are satisfied with OEM yield monitor and accuracy I don't think it would serve much purpose to you to switch to YieldSense.