(There's no video for SoftAT 2.5 yet. Please contribute to MR and add a video now!)
As the picture on the cover of the original manual might indicate, SoftAT needs some serious horsepower such as higher clock 68030 Macs. Basilisk emulation also works great.
Keen in mind, this comes with MSDOS 3.3 so you may want to grab v5 or 6 to truly enjoy the DOS experience.
softat.sit (727.02 KiB / 744.47 KB)
System 6.x - System 7.0 - 7.6 / compressed w/ Stuffit
I ran this on a IIci and it's pretty nifty! On an LCII though, its terrible! System 7.1
Emulating this? It should run fine under: Basilisk II