Leopard, Time Machine . . . in all honesty
I'm glad I queued up on the launch day for the sheer occassion of it all. That I wanted to pick up a multi-user version of Leopard was a by-product. Had it been cheaper on Amazon, perhaps I'd have merely been an onlooker that day but that's besides the point . . .
Am I happy with Leopard, is the question a lot of Mac users are asking. A lot will lie to themselves with their answer. I'm not UNhappy, but I'm not sure I wasn't happier with 10.4.10 - don't get me wrong, it's doing what I want it to do and Time Machine is lovely. But, like anything, there are niggles with it being a new operating system. Some are due to incompatible software (Skype 22.214.171.124 anyone???) whilst others are simply learning curves for the user - try doing a CTRL-Right Arrow within Excel to reach the end of the data range whilst Spaces is active!
The fact is, Leopard is going to be better when it reaches 10.5.2 and whether you upgrade now or later is simply down to one question . . . do you want to go through a little bit of an uncomfortable patch to be one step ahead of the game in three months time?
I've upgraded two of our three Macs . . . the MacBook Pro is staying on Tiger for now, thank you very much! Best of both worlds for me!