Conclusion: Yay or Nay?
Tiger is a great operating system, no question about it. I am generally hesitant to upgrade within the same number OS (I mean, OS X is OS X, right?), but I'm very pleased with the advances made in Tiger. There many useful new tools, upgrades to native software, improvements in Windows network compatibility, improvements to graphics support, and so on. Tiger offers exciting toys for novices and experts alike and continues the trend of well-thought-out and well-implemented Mac operating systems.
Will Tiger improve your organization and productivity? Possibly. It will certainly make organization and cross-application integration easier. Can you get along in the computer world without putting out $130 for Tiger? Yes. Is upgrading to Tiger worthwhile, assuming that the price isn't a burden? Most assuredly, yes. As a whole, I give Tiger and the seamless upgrade process a very enthusiastic thumbs up and highly recommend it to any user whose computer is up to the challenge.