Summary: In as much I have owned a couple of the Compaq models, I do not recommend them. Once the batteries run down, its very hard (but not impossible) to find the proper replacement. The battery out let stores are a hit and a miss, not to mention expensive. The HP models are more plenty full and you can fine the batteries almost anywhere. I love these things but as they get older, they begin to have issue's, not upgradable and not cost effective to repair.
Summary: This is a great product to start out with. It has all the features of a PDA plus those of a PC. My daughter needed something to compose her reports on when she's away from her computer. With the built-in MS Word and Excel, she has that capability. I din't want to spend a bunch of money on something fancy for basically the same purpose. The expansion pack makes it possible to go wireless, which is an added feature that will make this product more useful.
Summary: good pda for students and prof. expsndable memory sd slot for storing features , lots of exspanion packs .. gps , camera, phone, just to name ones i have. great pda for its age and since its about 5 yrs old the price is fair also.