Never owned a Kota bow mount before but looking at this one for the i-Pilot feature.  Would like some feed back on what others think about it.

I have the Powerdrive V2/70/US2 w/ I Pilot and the only 2 negative things I can say is the the powerdrive can not be used with a footpedal to override like the Terrova can, and if you lose the GPS signal or experience interference it needs to be run manualy. Excellent for river fishing in current and fishing in the wind. You can point the direction you want to go, set the GPS speed and go. The anchor feature is really nice. Comes in handy especially when you catch a fish you can hit the anchor button and not have to worry about running into shore or out to the middle of the lake when your trying to get the fish unhooked or take pics,or if you have to retie. You can also plot a trolling course and retroll the same area. It has a built in overload that kills the motor if you're running high amps either from Mud or heavy weeds. It resets after you kill then reenergize power to the unit.

I have that unit.  I think it the greatest invention since sliced bread.  As I said in an above thread, you are going to love the Terrova and i-Pilot.

I have one on one of my boats. So far I like it I have had one issue with it when I was in Canada for a fishing trip the motor just went crazy and started spinning and broke the locking collar that steers the motor. My fishing partner just had the same thing happen last week. Other than this I do not have any problems with it. I still have not used it enough to say that it is worth the extra money but the anchor button sure is nice. I still have not recorded a track and run it yet but I can imagine it would be helpful too.