I have the Grace Sure Stitch regulator on my Brother PQ1500 on a Grace frame. I actually love mine, like anything else there is a learning curve. It was very simple to install and it certainly does help. I just could not get myself coordinated enough to produce even, controlled stitches. I would get a huge case of nerves and was ripping out so many stitches I was about to give up. The Sure Stitch gave me confidence and my machine quilting has improved 100%. It was a big investment for me, I paid $499 for mine from AllBrands, several years ago, but it truly has helped. I am still learning and getting more comfortable every time I use it. You tube has a great little learning video produced by Grace Co that shows exactly how their stitch regulator works. For me, it was worth the investment. Good luck