A few points... Until you actually have a disk that nothing else will fix, you won't know if DW4 is as good (or necessary) for your toolbox as DW3 was 3-4 years ago. Quite often, the folks giving 4-5 stars to DW4, here, are doing so because it runs successfully and fixes a few things.

I have been a fan of DW for many years. Alsoft had made an indispensable utility that you really needed when the only alternative was the mediocre Norton Utilities. TTP is also, for all its flash and snaz, a little weak when it comes to doing serious work. Of the two, if I was limited to only one, I'd have to choose TTB. The reason, folks, is important to a consultant — DW4 does not work on a Mac with only 256mb of RAM installed. Period. DW3 did. And since I cannot be sure when I will run into this, I must have alternatives — like DW3, TTP and Drive Genius — availalbe to me.

When Norton was the competition, DW was king. Today, however, if you use and compare them constantly — and especially if you plan to only own ONE utility — you're better off with Drive Genius than with DW, and with either of them than with TTP — as long as you have 384mb+ of RAM.