I finally upgraded after over 6 1/2 years. I have retired my G4 450 Rev. A 'sawtooth' and have upgraded to a refurb'd 1.66 CD Mac Mini. It arrived on Saturday so I haven't had too much time on it yet, and though my newerTech v2 miniStack and 2GB RAM kit won't be here till Wednesday, I can already say it is a huge jump over my G4. I can't wait to see how well it runs with 2GBs of RAM. Still planning on getting a 2.33 24" iMac next spring, but this little thing will be a nice machine to use till then. It's my first superdrive as well as my first Tiger machine. I only had Panther running on my G4. So spotlight and dashboard are new to me. Not really sure what the other Panther - Tiger improvements were. Next on the list will be a Black 8GB Nano.