I used the PXR swivelling power cleats on my last Catalina 22 for the jib sheets. I loved them. Super easy to adjust and release.
Some folks warned me that a captured sheet was bad in case of emergency. I admit, the thought of a captured line can make you nervous at times, but at the same time having the line captured means it can't get away from you. In an oh-s#!t moment of the sheets get jammed, a rigging knife is an easy fix to the issue.
I will recommend sizing your power cleat and line so that the line is the smallest diameter that the power cleat is designed for. You want your sheets to fly through on release; if you use the max line size for the cleat it will not flow through the cleat as easily; this from experience.
I started with max sheet diameter when I installed my Spinlocks and was unhappy with responsiveness of the sheets. When I went to the smallest for the cleat, it worked fine and I had no more problems.
If you install then knowing when and how they might let you down, and have a contingency plan for if they ever do, I think you wil lfind they are super nice for handling sheet loads for a small boat.
I would not use them for halyards.