Whether or not you're going to buy OSX Panther will depend on a lot of things. If you're wanting an astounding leap of an upgrade, consider that if you own Jaguar, you can now update for free as far as 10.2.8, and this is only 10.3. So for Â£90, do you get enough? Depends how much Â£90 is worth to you. Personally, I'm happy with it, and I'm still finding new things each day. My computer (PowerBook 12-inch G4 867Mhz 640MB) seems to definitely boot faster (as rarely as I do that). It's altogether just that little bit faster. ExposÃ© works a treat. The main function, displaying all your windows at once with the flick of an F-key, isn't all there is to it. You can also clear the desktop, which is incredibly handy if, like, me, you're a Windows refugee who always had the "Show Desktop" Quick Launch button to hand. Upgrading was simple, I did a clean install, it took about 30 minutes which I'm sure is also faster than my last Jaguar install. All my software seems to work, except a piece of freeware called Rax but I know what the problem is here as I had the same problem in Jaguar - a Quicktime update (6.4), which apparently can be removed and tracked back to 6.3 in Jaguar, but not in Panther. Hopefully they'll update or something soon (Rax or Apple, don't care, as long as it works!) All my hardware works too (M-Audio midisport 1x1, Wacom Graphire 2, Zoom ADSL modem, Sony Ericsson T610 over bluetooth), and was a breeze to install. Overall it's simply made my computer feel that bit fresher. I like to keep up to date with things, especially when it comes to my PowerBook. In other circumstances I might have been a little disappointed to pay Â£90 for relatively so little, but I guess it's up to you.