In terms of pure software performance, simplicity, and stability, AW was a very nice app. And of course since apple wrote it, it worked extremely well on virtually any mac that was capable of running it, which was ALOT of machines dating back to the days of the original ppc cpu's......
For some reason, I kept it installed on every mac I owned, with the sole exception being my current MBP..... there were features of it that I found so simple & straightforward, as well as extremely fast, that I used it for ALOT of projects that did not require massive complexity or heavy duty formatting.