We have a 712 Power winch on our Cruiscraft 600.
Got it 2nd hand, don't know how old it was. But we have had it for 4 years.
We immediately changed from the wire rope to Dyneema and we welded the winch onto the winch post.
We timed the difference between a hand winch and it was 45 seconds on a single line pull. Sometimes if we come in on low tide the ramp is steeper so we go to a double line pulley, so the diff is 90 seconds.
If maintained ( greased) regularly they are trouble free. We do have a cover on ours though to keep the water out as well.