My 301 has a pretty, very well balanced stitch. It is easier to remove than the Necchi or the Elna, but still good and solid. I do have the knob turned almost to nine on the top, so I don't have much wiggle room. That may change when I put on the new spring. If I overfill the bobbin when FMQ, the thread will jump out of the slot. Solution - don't overfill the bobbin.
I always thought the Elna had the most perfect, strongest, hardest to remove to stitch I'd ever seen. The Necchi may be even more so. I really try make any errors with either of them!