Just installed the blaupunkt mp48 (london) too. I gave it to my brother to install because he works at best buy and does it for a living. he said it was one of the easiest installs he has ever done. i would say it was less then 10 minutes. i only needed his tool to remove the factory headunit and i could have done it myself no problem.

headunit replaced - new 6.5 inch subs behind the seats and components in the doors next!