I starch only sparingly, but I'm kind of a sloppy quilter, LOL. I only starch usually when I'm pressing blocks, not on uncut fabric, and then only occasionally. I do like Best Press best; I've tried regular starch from the grocery store once when I ran out (can't remember the brand; something in a red & white aerosol can) and it was a disaster. Flaky & messy and left white spots - it didn't even spray out neatly but went sputtering out everywhere. No thank you!
But so far my quilts have mostly been straight lines and boxes; not a lot of points or complicated blocks - it seems to me starch would be really helpful if you're doing kind of 'fussy" quilting like that.