Isn't this app seriously overpriced? This 2-trick pony's (Coriolis System's) other trick -- iDefrag -- is also overpriced at $35. Ignoring for a moment the very well documented argument that defragmentation is quite unnecessary on an OSX startup disk unless you're constantly adding and deleting really giant files, I will grant that iDefrag works quite well. But it too is something I might use just once or twice a year. And at a cost of $35, I'd rather defrag my Mac manually by simply backing it up to a Firewire drive (which the Finder does contiguously -- without any fragmentation), and then restoring the backed-up data back to my startup disk -- again done contiguously. When I perform the backup to Firewire drive I can either backup just my user-created files using the Finder, or I can backup the whole volume using one of the many free/donate/shareware backup apps that can clone a startup disk. The absolutely fabulous and uncrippled donationware app (they ask for a $10 donation, but app is fully functional without it) Carbon Copy Cloner 3.1.3 makes it very easy (and it's a great backup app too, as every Macevangelist, blogger, and magazine dedicated to Apple products agrees). Other very good ones are Synk Backup ($25), Synk Standard or Pro, and SuperDuper! ($27.95).

If $35 for a defragging app is excessive, then $50 for on-the-fly disk partitioning is surely more excessive -- unless you're a system admin. who does a ridiculous amount of on-the-fly disk partitioning, and I've never met such a person.