I'd rather have to pay $1000 once and be able to go through the stages and my own pace. Compared to flashes where it is going to cost you $1000 each time to flash. Whether your buying the maps online and loading them with a tool similar to the BT, or mailing in your ECU.
2008 335xi Sedan | Titanium Silver | Black Dakota
PROcede v5 | Vishnu Exhaust | BMS DCI | AR Catless DPs | Helix FMIC | Stett Charge w/ Tial BOV | MORR VS8s | KWv3