AVIC-X1 install for WRX

Hi, A newbie here... I was going to buy the pioneer Avic-x1 (euro version of the Avic-N1) and was hoping for a little info from all you pros. I have had a look at a number of forums and webpages, and this system seems rather complicated to install and you also seem to need to take a lot of the car apart to get the job done. I was hoping some peps on here would be able to point me in the right direction for some hints and tips. Additionally, if there is anyone that has a Subaru Impreza WRX (new age) and has installed any similar system whether there is anything specificly I should look out for. Any info/links really would be greatly appreciated. Thanks in advance!