Oh you almost certainly will dislike it at first. I've had an iPhone and then a HTC Hero. I absolutely hated the N900 touch screen at first and coupling that with some stability issues (no spontaneous rebooting though), I had my doubts. But now, after a week, I absolutely love it. It's by far the best phone/communications device I've ever had. If you ever wanted a real computer in your pocket (with all the things that entails), then this is the right device for you. But give it a week.

Now, I'm finding the touch screen is actually pretty good. I'm using it more and more, when in the beginning, I tried to find keyboard alternatives for everything. When my friends try the device, they have the same reaction: the touch screen is really weird. It takes some getting used to.