I bought my bike here because I got a pretty decent deal and was excited about the free tune ups. Turns out the service team isn't very good here.
DON'T be fooled by the free tuneups. My $3000 bike did not shift right from day 1. I took it back to Global 4 times and even tried 2 shops (Gilbert and Ahwatukee). I was told "that's just how they are supposed to shift". Even though it was skipping gears and shifting REALLY slow.
I eventually took my bike to Cactus Bikes. They made about 3 adjustments and it was shifting just like you would expect - hitting all the gears in both directions and would shift quickly. Looks like I will be a Cactus customer from now on.