I purchased the i90 to replace my other Nextel phone which was an i85. The operation of both phones is nearly identical.Here are the things that I LIKE:1. Programmable Styles: You can establish a setting for the car so that the ringer is louder or of a different type than what you would use in the office.2. Speaker Phone: The speaker phone is loud an clear.3. Reception: I had read some people say that the i90 reception was not a clear as the i85 or similar style Nextel phones. I have not experienced that issue at all. So far as I can tell the reception is virtually the same.4. Battery Life: I find the battery lasts about a day with heavy use (I'm an 1800 minute per month user).5. Voice Recorder: There is a feature where you can store voice memos which is handy for to-do lists and such.6. Menu Structure: The complete menu structure can be re-ordered by you so that commonly used choices are near the top.7. Construction: The i90 lives up to the advertising as a durable workhorse. I have had several other Motorola's and none have been this sturdy - including my Startac and Timeport.8. MIDI Tones: There are several pre-set MIDI tones you can use as your ringer (unfortunately they don't let you add any yet).Now, here are the things I don't like:1. In this day and age there should be one quick button to press that will allow you to turn the phone instantly to vibrate. (Note: Nextel indicates that the latest release of the i90 software supports the ability to quickly place the phone in vibrate mode by using the down volume key until you feel the phone start to vibrate.)2. The phone won't allow you to receive a call with the flip open and then shut it (as you might with a headphone) and continue the conversation. This feature has been updated in the latest software release so you can now receive a call with the headset on and push the speaker button to answer the call.3. The "smart" button doesn't seem to do as much as it could. All that I've found to use it for is to send calls directly to voice mail (Nice!!) and to view the last inbound number. This feature has been updated as well and the smart button allows you to now scroll the last few numbers received (using the volume keys) and push the speaker button to make the call.4. Cannot scroll the phone book with the phone lid shut.Overall if you are using Nextel, this is a great phone to get. I don't think they have all of the bells and whistles of some newer models - but for Nextel phones (typically bricklike in structure) this is a huge step forward!I use the phone extensively in my home area which is Connecticut and get excellent coverage throughout. Some have complained about coverage in other states -- so far as I can see all the carriers suffer from coverage gaps to different degrees.August 26, 2002: This phone has more than survived heavy use and many drops to the pavement. No damage so far. Have not found a reason that I would want to trade the phone in for a newer model - it remains a rock solid performer.