Good for ultra portability but by no means, are they a replacement for PCs or laptops.
Here's a review for that particular model:
Dual wireless connectivity; spacious memory; competitively priced
No vibrating alarm; audio player limited; lack of novel features
Palm’s TX represents the current state of the art for Palm OS handhelds, but no more. Its feature set is complete and well-rounded, and it compares very well against competitors in the same price range - yet is by no means groundbreaking. A broad range of software functionality is hampered by a crippled audio player and we miss the seemingly-forgotten vibrating alarm and LED indicator, but the the TX still holds its own against Windows Mobile devices. At the price point, the TX is a good, solid, but in no way earth-shattering device.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?