Bernina is the only DSM (as far as I know) with a true stitch regulator. I have the BSR and love it, although I don't use it very often since I now have a longarm with a stitch regulator. With any tool, there can be a learning curve. You still have to be somewhat consistent when starting and stopping, but overall your stitches will be much more regular. If you have already learned to free motion without a stitch regulator, then you may find it harder to get used to one than someone who has never done free motion.