I have a Treo 600 (got it a couple months before Verizon put the 650 out). I turned off the email after a month-- the $50 a month data plan was not worth the money and I can check email enough as it is. I use the phone, calendar (with alarms) and contacts all the time. I keep small notes on it; and I use Avantgo so that I always have something to read. I have other reading material on it (Dickens and Shakespeare with a e-reader-- C Spot Run, I think) but I rarely read that stuff. I had a Clie for a couple years before that and used it regularly for everything above, but it was too much to carry that and a phone so I never had my phone on me; which was a pain in the neck. So, to answer your question (I guess) a phone with PDA capacity is worth it for me.