Kenwood 7100 install navagitation.

Just woundering if any one out there has installed a Kenwood DNX 7100 in their Mazda CX7,if so, does it work well,any problems getting the plastic housing for the install etc. I would like to install 7100,I understand Kenwood is coming out with their DNX 8120,but I'm trying not to spend out of my budget. Thanks for any help you can offer.
 
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