Yep, the ergonomics of the AFS blocks can’t be beat. Acrylic works but they are not easy to grip for long sanding sessions imho.I love my afs blocks. I also have a set of the linerear blocks also along with a bunch of homemade acrylic blocks. I dont think anything will be as comfortable as the afs blocks. I guess acrylic blocks will always get things straighter. I tend to do my initial cuts with acrylic, but when I get up into the 320/400 range, I always grab the Afs blocks. Just a personal preference I guess.