Microfiber is bad for skin contact because it wicks away moisure and thus causes a rash.
I know a lot of mom's are not a fan of microfiber, but I am thus far, never really used anything else in 9 or 10 months of CD, other than hemp once, and a flour sack towel on a couple occasions. It may help that my babe isn't a heavy wetter; I don't double up inserts, but I change her no less than every 2 hours, if not sooner.
Flour sack towels are a great cheap alternative because they are SUPER easy to clean (and can even be thrown in the sanitize option in your washer). Only problem is they can be a bit bulky. I have a pack of 5 but I haven't really had an issue with the microfiber so I'm sticking with that for now.