I Just bought the new Nextel i730. I love it. I've been a Sprint customer for the last 2 years and have been used to the little silver phones with the color screens so when Netel put out this phone, I finally fit in. Plus, nextel has the new plans where you can get free incoming calls. Since 90% of the time I receive calls rather than send them out, my bills have been dramatically lowered.
Also, I recommend that anyone considering getting a nextel, ask about their specials that are offer through different places of employment. I know Taco Bell, Comcast, and Meijer's employee's receive a discount. I ended up getting my phone for $199.99 when it's regularly priced at $299.99. Accessories and monthly plans also are discounted.