I have the 1600 P-QC. I can't tell you how GREAT SUPER FANTASTIC it is! it will sew ANYTHING! If it will fit under the foot lifted all the way up, it will sew it! The QC is what I bought because it WILL NOT let you sew if the foot is not down. we all get in a hurry and forget this sometimes, so it is my favorite feature. that and it is super duper fast. i had to switch to ball point needles for FMQ but anything for piecing.