Spent a couple of hours on the water yesterday evening. Was a good time to test out the trolling motor, not the best for fishing. Winds were steady at ~ 10 MPH with 15 MPH gusts, so the open areas of the lake were very choppy and pushing hard on the boat.
The first thing I noticed was that the motor has significantly more thrust than the previous 50# unit. The boat responded quickly and even in the wind and chop was able to be navigated. I eventually pulled into a sheltered cove with calm water and the motor worked really well and was dead silent. In the choppy water, not having to deal with the foot pedal was very nice, and the extra foot space gained since I didn't even attach the pedal meant that it was easier to keep my footing in a rocking boat with the clearer front deck.
Getting used to using the remote will still take some time. I need to attach something to the bottom of the remote so that the orientation is clear, otherwise everything I do is backwards. I need to tighten up the mount a lot; the long shaft and high power is flexing the rubber mounting points more than I expected, so I'll need to make sure they are as tight as possible, and if it still moves, add additional mounting points. I don't see any difference in the quickness of the motor turnming compared to the cable drive unit. When I push the direction buttons on the remote, the response is immediate.
The most difficult thing to get used to is the fact that the trolling motor prop has to be turned on and off. WIth the previous unit, the power to the prop was via a momentary contact switch; as soon as I let up on it the prop stopped turning. With this motor I have to explicitly turn the prop off.
On the issue of getting the motor in and out of the water, out is consistently simple. As long as I remember to have the motor turned so that the prop is to the right, it comes right up and locks into the mount. Putting it in the water is still more problematic. As SWIRE pointed out, you do the same thing twice and it works once but not the second time. It will take some getting used to, but it looks like if I unlock the motor and push and twist the head at the same time, it releases properly.
Thanks for the suggestions folks. This motor should be good for the remainder of the time I own this boat.