The Sidekick II is a great phone and does a LOT of things well. E-mail, Yahoo and AOL chat, lots of game selection and many other handy features. However, the web browsing is exceedingly slow most of the time. Every now and then you will request a page and it will actually come up within 10-20 seconds. Most of the time however, web sites will take 2-3 minutes to load, if they load at all - regardless of signal strength. In other words do not rely on the web browsing, especially for time-critical tasks (like looking up flight info at the last minute). Also the phone just acts flaky sometimes - lock ups, unresponsiveness to button presses, weird states, etc. are all quite common. I also experience dropped calls and echoes quite often, though this could be due to T-Mobile's service and not necessarily the phone. In summary, great features but prepare to be frustrated at times.