I have owned Garmin (Several), Tom Tom, and my DW bought me a Magellan Roadmate 9165T for Christmas two tears ago. They will all have you scratching your head as to why in the world is it sending me this way. I always found it amusing they will send you one way to get to a destination and a totally different one on the way back.
Of the those that I have owned, Garmin appears the least problematic.
The DW got the Magellan at CW to use in the RV as it was supposed to be RV friendly and recommended by CW/GS. I find it interesting that CW/GS has not logoed a Rand McNally product as their GPS unit.
I don't like the fact it won't recharge itself when connected to the laptop for map updates. You have to be sure to have a full battery before you start the update process.