Im going to take a little gamble and say that every single person that posts on this thread is going to tell you to use beads.
(And just to be a team player, so will I.) Just kidding, the truth of the matter is that they hold and maintain humidity extremely well and they're easy to recharge. They both absorb and release humidity and if your ambient humidity outside the box is remotely near normal, they'll do an outstanding job of maintaining it. I consider pillows to be a short term solution like temporary storage in a tupperdor.
I will say this though. If you live in a dry house, use 70% beads. If you live in a sweltery hot place, use 65% beads. These observations are based on my personal experiences.
dutyje:Pillows don't absorb excess ambient humidity. Beads are supposed to, but that has never been the case for me.
tankbonnies:Beads.....cheap, little to no maintenance and lonnnnnnnnnng lasting.....set it and forget it......also...always buy more beads then needed, it does no harm to have more....
kuzi16:unless by "humidity pillows" you mean the Boveda packs. those will regulate humidity up and to a lesser degree, down. however, they cannot be recharged. thats the only drawback to those.