i jumped on the lee quick trim system real early on when they announced it. i have one for almost every caliber i own. just like you.. i find trimming and case mouth cleaning to be the biggest "ugh... do i have to?" part of reloading. especially on calibers i shoot in volume.
its not so bad trimming 50 cases on a hunting only caliber to replenish a hunting load stash... but loading up 1000 300 BO subs... or a batch of 1000+ 223 plinkers.... ugh is about the politest term i can come up with lol!
like you said, its not the fanciest, but it does a good job as long as you dont spin the cutter bit too fast. if you use a super high RPM driver to spin it, your adjustment bushing will lose its adjustment setting and your cases will end up a few thou shorter than you wanted. i tried using my bosch impactor... but 3000 RPM and you lose the trim adjustment setting after like 2 or 3 cases. no thank you!
drop back to about 1400-1600 RPM with a drill/driver tool and its like butter!
helpful tip if you havent already - for thin necked cases like 223, etc - take the ball bearing out of the spring assembly (under the cap) and replace it with a airsoft BB. it'll only actuate the center spring extra and take some tension off the outer spring. i find you get a nicer chamfer/deburr with it set that way.
for thicker necked casings (308, 30-06, etc) i put the factory ball bearing back in there and let it have at it.
not my trick, just something i found online early on from the 300blk forum from a member using it there as part of his "making 300bo from 223" process video he posted online.
HTH