I was all in favor of Tom Tom, and specifically waited to purchase the new models. However, they have changed the mounting bracket for them which has flawed them in my experience.

On the x00 models the Tom Tom sits essentially on top of the mounting bracket. The connection is on the base and it swivels around there.

On the x10 models the bracket now "hooks" into the back of the Tom Tom and the connection is made there. It looks like a more elegant connection and I didn't expect any problems.

However, while driving down the road, I would notice the Tom Tom occasionally turning itself off on its own. I finally traced it down to that there is enough movement where the connections are made that it apparently occasionally senses a disconnect which causes the Tom Tom to power off. It doesn't require a really bumpy road, but just the right movement.

I tried 3 different units from Best Buy (910 models) before I finally threw in the towel on them. (As well as a blistering arguement with Best Buy that they were defective, as one Store Manager wanted to argue that the turning off on its own feature wasn't a defect, thus they should charge me the restocking fee )

So buyer beware... If anyone else has the 910, would be curious if you have experienced the same.