Not bad. Not great.

EDIT: I just realized that mine is a MIO Digiwalker C230.

This is my 4th GPS. 2 Garmins. 1 Tom Tom (short time only). Now Mio. I use my GPS religiously as my sense of direction is terrible, almost handicap-like. And my profession requires meeting lots of clients. At least 4 years with a GPS now so I'm pretty good with them. This Mio is kind of lacking. Compared to my 4 year old Garmin iQue 3200 PDA that's out-of-date, the software is not as good. I bought this MIO as a cheap backup ($185 shipped). And using both GPS at the same time, the MIO kept sending me through the city streets rather than the more efficient highway routes that the Garmin used. Yes, I did set the MIO's settings correctly...using "fastest time", "highway", "toll roads", etc. (6/10)

Navigating through the touchscreen menus is ok. I may be biased since I'm already used to Garmin's software for 4-5 years. It's difficult to accurately rate this part because you'd need to play with it for a while and also have experience with another system(s). If this were my first ever GPS, then I would think it's the best ever. Obviously any GPS would beat a map and/or Mapquest printouts. But I would go by how many more Garmins gets sold vs. Mio...so I would say Garmin is better, especially due to this Mio sending me through less efficent routes as stated above vs. my really old Garmin that's had no software updates. (7/10)

The MIO pics up the satellite signals fast and indoors too, due to the SiRFstar III...most of the newer GPS have them now. I don't even have to mount it to the windshield. Leaving it on the passenger seat works. I bought this instead of the Garmin Nuvi 200 which was about $209 at the time and doesn't have this SiRFstar III chipset. (8/10)

Points of Interests is about 1 million, which is on the low side when compared with the average GPS out there now in the same price range.

Battery life is average. It doesn't come with an A/C charger (only car charger), but you can connect it to your computer with a USB cable and it will charge. Doesn't come with a USB cable, but most people already have one. (7/10)

The MANUAL is pretty bad. I was up and running w/o it, but I would imagine that this would be pretty tough for a new or causal user. No hardcopy, only a .PDF Acrobat file manual. Most people would need a manual while they're messing with it in their car and not when they're sitting at home. Many of the functions are not explained clearly nor are the steps always logical. (6/10)

SD Card. I searched the PDF manual and found only one use for it which is to save data, waypoints, etc....which seems to be a tiny file less than 1mb (so far mine is 35 kb). (2/10)

Text to Speech. This is the best feature for a GPS purchased in December 2007 for only $185 shipped. The road names pronounced are very recognizable. It also reads out the exit numbers too. (9/10).

Volume is too low, even at highest setting. Especially if you have a convertible or a convertible with loud exhaust. So far I'm ok with the convertible top up and windows closed but will have problems once the weather gets nicer. There are no audio jack to connect to an external speaker, earphones, etc. IMO, this unit really needs one. This is a big deal. (5/10)

Screen is on the small size. When in pilot mode (while navigating), there is even less viewing area. But in 3-D mode, it's still good for the price. (7/10)

Speed camera function (alerts you when approaching them?). I haven't encountered one yet. Not sure if it's working or not. I've not tried to see if there are ways to update these speedcamera locations yet. There is a way to input in camera locations. (?/10)

Again, this is my backup GPS. It would be my primary but my outdated Garmin iQue 3200 functions better (even w/o the SiRFstar III chipset, text-to-speech, etc.) Why the backup? Because the Garmin iQue 3200 is known to crash and being unreliable if you happen to get a lemon (that are more common than rare). This is a hardware and OS system problem, however Garmin's guidance software is excellent. And if you stay away from Garmin's PDA (Palm pilot types) iQue's, you'd be fine with Garmin's handheld/auto GPS like the Nuvi 200, etc...