Nice install.

The advantage of the glovebox mount is that you can keep the ipod in the glovebox hidden from view and lock it in there if needed. The disadvantage is tha you'll need a little longer cable to comfortably work it from the driver's seat. Another disadvantage that I discovered the hard way was that if you leave the cable connected to the aux input while in the glovebox, if anything hits the cable as it enters the connector (like the leather folder with all the manuals) over time it will loosen and you'll have an intermittent signal. Annoying as hell. So now I keep the cable disconnected at the aux input when not using an ipod and also cleaned out the glovebox somewhat.

Last point, if you are using an ipod make sure you get a cable with a connector that connects to the bottom port of the ipod rather then the headphone jack. That way you'll get line-out output from it and can control the ipod's sound with just the radio controls and not have to use the radio controls AND the ipod to adjust the sound.