I use poly batt 99% of the time with no issues but it's a lower loft batt. I've done a couple projects with a super fluffy hi loft batting and my machine did fine, I just had to go slow and make sure everything was well pinned. My walking foot was a must and when I loaded and moved things around I had to double check more than I typically do to ensure that all my layers had no puckers. Came out fine, I'd use it again (was Soft Soft Hi Loft)