A non-political question for

A (non-political) question for readers: If you’ve had experience, good or bad, using a Tablet PC, I’d very much like to hear from you. I need to get one for note-taking and for marking up .pdf documents for display on TPM. Unfortunately, few places stock more than one or two, if any. So it’s hard to get any hands-on experience on which are user-friendly, simple-to-use or even reasonably functional. And I’ve heard that many of them are just hopeless and not worth the price of purchase. So if you have any tips, pointers or advice, I’d greatly appreciate hearing them.