i havent gotten any work done by him but i have bought parts from him and like jared said hes the best guy in the world to deal with. hes a top notch guy and will stand behind his products and work. no worries.
It installs a different app market in addition to the apple market where you can use custom themes and get apps for free like facetime etc. I don't believe you will be able to install flashplayer though.
what kind of riding will you be doing on this machine? if you want it to be more dunable you can get a serval and port it and be fast with less of a light switch powerband. or you may prefer the power delivery of the cub. depends on your riding style.
start out around 162-165 on the main and a 50 pilot, CEL needle middle clip for the cub
no need for race gas if you dont need it. bump up the compression and timing, then run race gas.