The One Touch gives you a Drive Image - but if the configuration is the same as my 12 month old one then it will only let you link to one PC.
The Retrospect software is very confusing in the very truncated version that comes with the Maxtor. I've posted in detail on this before but the essence - the answer is that the software is very easy to use as long as you look straight ahead and look for the one touch controls only!!!
Also i think you'll find you can download MaxBlaster3 from maxtor.com which will probably do the job you want for free - if it is multiple computers you want an image of.
For more info on drive image software search this site, several informed threads exist that fairly lay out the virtues of all the options. Suffice to say not all work all the time - or at all when you finally really need to use the image!!!