The Z22 is a very simple, no-frills PDA, exactly of the type that I needed. It only has 32 megabytes of memory, and is perfect for keeping all my information and appointments organised.
The Z22's small size and compact design mean that it fits easily into my pocket. The screen is of a decent size, large enough to display photos, although the limited memory means that it does not make a good picture album.
The default applications that come standard with the device are enough for my needs (a basic GTD implementation), and there is a wide variety of software available for the Palm that could also be installed.
The synchronisation with the PC is quick and easy through the provided USB cable (the Z22 does not support bluetooth). It also offers Outlook Synchronisation, which I have not tested, since I do not use Outlook.
Overall, it is a very good basic PDA.