SSF has been in a usable state for me for literally the past 10 years. Sure, it wasn't good a decade ago, but more than a handful of games were perfectly playable back then. I was using it as a replacement for the actual console after my Saturn bit the dust in a car wreck in the summer of '05.
I don't know how the myths of Saturn emulation persist.
Disagree. Usable is the key word, but many many games do not run 100%. Either they crash, have graphical glitches or the music doesn't sound right.
Speed is good however. The Saturn emulation community is basically dead and I never see it as good as other emulated systems.