Tire Kindom is a running a special where you get your 4th yokohama AS430 free if you get an alignment. Any questions I should ask about the service? Anyone had expereince with tirekingdom?

Nothing is ever really "free"!

I'd ask about their level of experience handling alignments of high-end European automobiles. If you want to get the deal on tires tell them to skip the alignment and give you a better discount. And be certain they don't screw up your wheels!