This is quite nifty program.
Works well on Linux, Windows and Mac OS X (tried both PPC and Intel models).
Will test it out on Solaris soon.
But I think it's rather expensive, though for my zoo... I might get it if $20 covers ALL flavours.
If not, no go.

For the folks who run it only on couple of macs, price not justified IMO.
It would make sense to sell 'whole deal' for $20 while allowing to buy 'single-flavour' at $5-$7...
That would complicate license checks of course...

On a second note, it's not easy now to 'compare apples to suns' - there's no graphs supported as was in old trusty MacBench 5 (Mac OS 9), neither it is possible to have windows automatically lined up and expanded, nothing to aid that, just pure manual window-fumbling.
That, and of course, extension beyond benchmarking just the core (CPU+memory) would be my only two wishes for version 3 release.

Keep up the great (and important, among some folks) work!