If you add basting thread (it's fusible) to one of your loopers, then when you press the serged edge or hem, it will definitely hold it in place for you to secure w/ permanent stitching. I think it also dissolves away, so don't use it place of permanent stitching. I definitely wouldn't recommend anyone spend a lot of money on a serger til they know they'll like using one. Start out w/ a lower-end model w/ a couple of practical feet & settings & work your way up.