I just bought an american pro classic mustang, and it does have some personality but it plays great and sounds perfectly mustangy.
Only complaints I can come up with, is that it has a bit of a resonance issue (like a dead spot) that slightly dampens the second hamonic above the fifth fret on the E string (I am tuned down to D). Can't be heard unless you really listen for it, but it messes with the envelope on my synth pedal, comes across as a short dip in volume. Quality control or extreme tone nerdiness? Ha.
On the QC front, the bridge is installed slightly off. Strings line up perfectly with the neck, but the holes drilled for the string through are not lined up between body and bridge, making it hard to cram a string through. The neck screws freaked me out. Slightly smaller than normal with a bit finer thread. I replaced with a set of the normal fender kind, CA glued the holes, they tightened up nicely.
Still a keeper, but I have a mim mustang PJ that is so fantastically perfect in every way, plays better than anything, weighs less, even the narrow nut width that would normally have been a deal breaker somehow feels just right... you know the kind of bass that you pick up and play for hours thinking only of the music and when you stop you look down and are suprised that there is a bass there? makes it really hard to be impressed by anything else. It's a 2021, maybe Fender used up all the magic that year.