I love post-it notes and use them pretty much everyday. On my desk I always have one of these 4x4 Yellow Ruled Post-it Note pads.
I'm not sure about every other type of Post-It and I'm not sure about quality control on these, but the ones I've used are exceptionally FP friendly. In fact, the paper out performs many other cheap papers I've tried despite the fact that it is lightly coated.
There is no feathering or bleed through.
Drying time is a bit extended (probably because of the coating).
The lines do not absorb ink as you can see in the photo.
HTH and No Affil.