Very satisfying.
I have a pair of heavy curtains, one of which I use as a door curtain. It was too long so I used my lovely old hand cranked Singer to hem it and then turn it up to the right length. It has to be said that the machine is far more capable than me! Not the tidiest job, but then it's the first time I have ever sewn anything with a machine. The sewing is fairly straight, I didn't break the thread, and the curtain is now hanging up in the door doing what it is meant to do.
I can only get better!