Rating: - Each version is better than the last
Each upgrade of Mac OS X improves over the last. For me, 10.5 is stabler than 10.4. I like the integration between Mail and iCal and Address Book. Being able to create event or contact from an email is easy and a real time saver.

A couple of negatives. Events are harder to edit than in 10.4. Mail offers syncing with Google, so you have your contacts on your Google account as well as Address book. I've found this to create duplicate addresses and contacts - not helpful because you have to purge those from Address Book.

I look forward to 10.6 and its promise of more efficiency over features.

---

Rating: - Excelent product
This product reinforce OSX as the most reliable and functional operation system in the world.

---

Rating: - Mac OS X Leopard - Worth it!
I'm a newcomer to Mac from the PC world having just started out with this 1st Gen Mac Pro. I immediately replaced the 250gb drive with a 500 and bought Leopard to install on it. The installation went perfect, with none of the nonsense I'm used to with PCs and considerably less expense.

Here's my initial impressions after about 3 months of living with Leopard:

It's easy to learn, stable and fast. The default mouse setting was 1-button. Setting it to "2-button" in System Preferences was a big help for me.

I'm going to compare it to Windows, as I have no Tiger or any previous Mac experience, so...

It's not as pretty as Vista, but is a lot more useful. It's a bunch faster and more stable too. This comparison is based on a Mac Pro vs. a high-end Core2Duo / P35 PC system with Hardware RAID and 4gb RAM.

It appears to be more secure and trustworthy than Windows XP or Vista. Maybe this is because of the OS itself or because fewer people try to hack it. Probably it's both.

Time Machine is great, very easy to set up and use. Unlike Windows System Restore it saves your files without the hassle of well, backups.
Want to copy your entire Hard drive for the ultimate Backup? No problem with Leopard. Windows is designed to discourage this practice and will usually kill the activation.

Boot Camp works great. It allows the computer to run Windows extremely well for those of us who have some Windows-only programs still in use.
Curiously, Leopard can read Microsoft's NTFS files but cannot write to them. Windows on the other hand can't even read Mac's HFS files. There are utilities available for either. The ancient FAT32 is a good go-between.

The cost: You get a FULL version of Leopard with all necessary drivers for any Mac it can run on, Windows drivers for Boot Camp plus the DVD doubles as a system restore/diagnosis/disk utility disk all in one little package for one low price. Also, there's no nonsense with entering Serial Numbers or Activations. All it really does is check to make sure that you're installing it on Apple hardware.
(For those of you Apple diehards out of touch with the PC world, Windows generally costs a LOT more, plus a 25-digit serial number has to be entered and then "Activated" and if you change too much hardware, you're expected to pay them again to re-install it on the same machine!)
This total lack of hassle alone has me sold on Macs and Leopard.

Have Fun,
Keri

P.S.
Thanks Steve! :)

---

Rating: - It's OK, but...
I'm a Mac fan, and I got this upgrade because I thought it would be like every other OS X upgrade. They usually seem to make my computer faster, and ad some great features.

This didn't, it actually is slower, it messed up my computer when I installed it... and then once it finally started working it was really buggy. I think apple really rushed this one out the door. Subsequent updates have helped out, but really... it wasn't worth the price, which is the first OS X upgrade (I've used every version of OS X) to have that problem.

---

Rating: - Mac OS X Leopard more & less than expected
Overall, this is a nice addition to the mac family and to my personal computing experience. I love the new dock, and I'm sure I will love spaces once i get a little more used to it. at the moment, though, it's slightly confusing. To me, the best part is the preview windows in the dock, and the ability to preview items in your finder by hitting the space bar. My only real complaint is that iTunes decided to stop syncing my iPod Touch after I installed 10.5.1. Nothing I've done has fixed it. I'm going to keep researching, but I use my mac for music more than anything else, so that's a big bummer for me.
Other than that, though, it's a winner!