I don't have much experience with the Atari ST, so I can't really write a long comment here. From what I've seen though, the OS looks and feels a lot worse than the Amiga Workbench.
[Reply]

It was kind of OK, but inferior in many ways.

I have an Atari 520STfm and an Atari 1040STf sitting at home .... I still 'sometimes' play on them, but much prefer the Amiga.
[Reply]

It was good, but.... Amiga was/is better!
[Reply]

I loved it... it just didn't love me back!
[Reply]

They STs weren't exactly robust.
A few mates had them and they seemed to be very flakey.
Games locking up on a regular basis, parts breaking and the like.
All though they all claimed the machines were fine until I walked into the room.
Maybe the machines sensed my hatred and it unnerved them.
[Reply]

Only ever used an ST at school in music and I didn't like it much so I went back to the drum machine lol (needless to say I failed GCSE Music).
[Reply]

I still have a 1040ST but never used it. Got it from a friend some years ago. I think it was Ok.
[Reply]