Yes I have installed what Gilomen calls the "Fuel Saver" Clutch kit. on my 2022 Premium Crew 1000. I prefer to call it the "Low RPM" clutch kit. Yes it really is a noticeable reduction in RPM's and cabin engine noise. As far as fuel savings goes, it really depends on your open road cruising speed. If you constantly go 30+ MPH yes GPM will improve. If you trail ride in the 5 to 15 MPH like me, then no fuel savings at all, I got ~ 9.5 GPM before and after only because I only use it for low speed utility work and leisure trail riding.
With all that said bottom line it really reduces engine RPM, hence cabin noise. Long term engine life should be greatly increased. I also purchased the Performance tune to lower radiator cooling fan cut in from 205 down to 190. Another feature to prolong engine life.