Traffic Reports NOT Available At All (Aug '08)
I just got off the phone with Mio, as I tried to learn how to turn on the "optional" traffic report service I was told (by the salesman in the store where I bought it) I would have to buy a subscription to.

Mio says "The model 300 does not have the hardware built in for receiving traffic reports... but that feature will be available in the future."

No date was given. But I was told that the Moov 310 has traffic reports built in.

If you want a unit that adjusts to traffic conditions, do NOT buy the Moov 300. (I am now taking mine back to Radio Shack.)

Good beginnner GPS for local travel
I purchased this unit to use on the road. I have been using a GPS system for about 4 years. I have one built in to my Jeep, have been renting from Hertz when traveling. Decided I would purchase a unit to save the rental fee everytime.

Pros
The unit is able to locate satellites very quickly. The street name announcements are great. The tracking is quite reliable.

Cons
System does not include airports as a POI. I was unable to locate an airport unless I knew the terminal name, not just the city or airport name (ex: can't find Phoenix airport or Phoenix Sky Harbor airport). It could however if the terminal had a name, such as Barry Goldwater Terminal 4. The chances are remote a traveler would know that level of details about an airport. I contacted tech support,below is their response.
Hello, because there are over 120 million poi's in the US alone and not all can be listed. And our map supplier decides which goes into your maps. There is a POI loader that will be coming out soon and will be announced on our website. This POI loader will allow you to look up anything you want and save it to your PC then transfer to a SD card for your device.

I find this to be crazy and not of much use. So I returned the unit after 2 days and purchased a Garmin Nuvi 360.

Hope this helps.

Wost purchase ever
This was my fourth GPS: I had early versions of Tom Tom, Garmin and Intellinav 1. This is by far worst GPS ever. I used it once, on my way from work to home. It gives directions to the next intersection only. In the city, it says: "in the next 100 feet go straight" every 100 feet. On the highway, it says "in one mile, keep left", every time there is an exit on right or the road has a curve. Finally, when I was on my street one block from home, it said: "turn right". I decided to return it. And it is impossible! The ANTOnline, which sells this device through Amazon, refuses to accept returns of GPS. Amazon supports their policy. I had to buy another GPS and keep this one as a reminder, not to deal with Amazon anymore.

So Far So Good
I need a GPS for my daugther, who got her driver license recently and have been calling home asking for direction often :-) After surveying the field I narrowed my choices down to: Garmin 260W, TomTom XL-S, and Mio Moov 300. The main selection criteria are:
1. bigger screen
2. text-to-speech
3. all gps functions, none others (e.g. bluetooth)

Since Moov 300 is fairly new and there aren't a lot reviews it is sort of a risky buy. However, since all 3 are pretty much the same functionality-wise, the tie-breaker came down to price. After a couple of weeks, here are some opinions:

Pros:
1. fairly easy to use (never read the manual).
2. find satellites almost instantly (< 15sec), even inside my house. Note that performance might vary, I can only speak from my experience.
3. Good text-to-speech, announce direction in advance. Again, I read some people complained it announced turns too late, but not yet to me. It usually announces twice, once to remind you beforehand, the other when the turn is near.
4. fast re-route
Cons:
1. Battery is weak, less than 2 hours.
2. Sometimes the route is devious.

Overall, I consider it worth the money if you are not too picky.