Hi,
I had no problems whatsoever installing AROS.
I burnt the AROS CD and installed it on a 6 year old Dell Dimension 4100.
The computer is equipped with a USB mouse with a PS 2 adapter. No issues there.
I was able to browse thru the OS, open samples, run them. Nothing crashed. Nice experience. No problems.
For an individual like me, who knows NOTHING about AROS and very little about Amiga OS, it was easy and straightforward.
I suppose there are compatibility issues with some hardware and that's to be expected.
Fester