I recently bought an Acura TL sedan with HandsFreeLink (their Bluetooth system). My current phone was a Motorola V300 (non Bluetooth) through T-Mobile that had been out of contract for a year+, so I started shopping for compatible phones. The Acura HFL website has a chart of all the phones & carriers, showing whether or not the phones are compatible with their in-car system -- some phones don't pass at all, while others have limited functionality. This W300i phone was listed as having full functionality through Cingular. But I wanted to switch carriers to our local Cincinnati Bell. Neither Acura nor Cincinnati Bell could confirm whether the phone would still work, but when Cinti Bell said I could get a full refund on equipment & fees if I returned within 14 days, I took a gamble. It paid off, as I discovered that I could import my contacts directly to the car system, and I could answer/talk/hangup by simply pushing a button on my steering wheel, and could even see caller ID and battery/signal strength on the little screen on my dashboard. Very cool! The phone + car automatically 'synch' whenever I get in & turn the key; I don't even have to take the phone out of my purse or pocket.As for the phone itself, the Good:Nice, clear sound. Much better than the Motorola V300. And the volume control allows more than adequate adjustment for when I'm in a noisy environment.Decent battery life. Even when I use it as an MP3 player (more on that later), I can go for several days without charging.Charger connects easily. Unlike the dumb Motorola charger, which had two tiny little pins that didn't always want to connect properly the first time, and which the slightest movement might cause to disconnect, this charger connects with a solid click and stays connected until you remove it.MP3 player + FM radio. Nice little features! Although the supplied earbud headphone cable has to be connected to receive FM signal. Plenty of bass and midrange, and more than enough volume control give it a pleasant listening experience.The Not-as-good:The buttons. They're large, but they slightly overlap each other & are flush to the phone, so it can be easy to misdial if you're not careful. I rather prefer the tinier but adequately-spaced buttons of the Motorola.Harder to find cheap cases & accessories than with the Motorola. Not surprising, given that Motorolas are so much more popular (even though they're not all that great). I used to go to [...] every time I got a new cell phone, because they've got great selection and prices on cases, car chargers, etc. But they didn't have much for this model.Narrow choice of onboard ringtones. I like having ringtones that sound more like 'real phones', instead of a song. They're easier to hear when background noise is loud, and they're not as irritating to other people in an office environment. But this phone came with only 1 such ring, and the free tones on the SonyEricsson site were only the same exact ones that came on the phone to begin with -- mostly just dumb little "space-age sounds" and other digital ditties.The Disc2Phone CD that came with the phone -- necessary to upload tracks to the MP3 player -- was a little dodgy to install. It didn't have one of the required components. After 3 unsuccessful attempts, I finally allowed it to "search Windows Updates" for the missing component. It found it, and after that everything went smoothly. If the manual that came with the phone/software would have been more helpful, this would have been a lot less frustrating. However, after installing the software, I found it very easy to use -- I imported several tracks off of CDs. It wouldn't import directly from my iTunes purchased tracks, but I had burned those tracks to CDs, and was able to import from those CDs. The only watchout is that you have to be connected to the internet for the Disc2Phone software to work. (Why?? Is 'Uncle Sony' watching what I upload?)And for those living in the Cincinnati Bell service area, I've found local coverage to be FAR superior -- and the signal MUCH clearer -- than T-Mobile. Am not sure how good nationwide coverage will be, but since they share networks with Cingular and AT&T;, am hoping for the best.