I wish I had never let go of my Blackberry. I think the Treo is ok for calls (kinda), and syncing with my computer, but not much else.I frequently receive pdf files from co-workers and clients, and I couldn't review them on my BlackBerry. I can download them on my Treo, but can't actually READ them. It shows the full document on the screen. The screen is great- but not for reading a pdf- you can't "zoom" in. Reviewing an 8.5 x 11 inch document on a 2 inch screen is impossible.It is not as user-friendly as my BlackBerry was. It was much easier to find and change preferences and settings on my BlackBerry.I do think that some of the problems I have are due to being on the Sprint network. Occasionally my phone will just turn off, and I don't know it. I go to make a call, and it will say that the phone is off, and ask if I would like to turn it on. Hello- I am trying to make a call- YES, I want to turn it on.Another thing that I really hate about the phone is when you are on a call and someone else calls and leaves a message. If your phone is set up for a ring tone when you receive a new voicemail- you (and the person you are talking to) will hear the ring tone in the middle of your conversation- and you can't turn it off- you have to let it run its course- not good when you are on the line with a client.If you do decide to get a Treo, I suggest you set it so that the screen locks while you are on a call. Because it is a touch screen, you can do all kinds of damage with your cheek while on a call- set alarms & to-dos, change calendar events- lots of annoying things.I also suggest that you set the phone to lock when you are not on a call. Before setting up this preference, my purse made many a phone call. MANY a phone call.One thing that I DO like about the Treo- it syncs great with my calendar and email. I feel like I am always up-to-date with what is going on at the office.All in all, I miss my BlackBerry. I wish I had never made the switch.