I received the ESS tuning cable and software yesterday. Downloaded my ECU software; sent it to ESS and they sent update back. Installed that easily (using Win 7 -- their software doesn't work on Win 8 yet).

Only drove a little last night but the driving felt so much smoother under (moderately) hard acceleration. Did not appear to have hanging in any gear. Going to try to test this more on the weekend.

******** Removing all the exchanges with jeremym ************
*** I'm annoyed with myself for even posting exchanges with him ***

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2008 X5 4.8i | Wheels: Summer> style 336 20" RFT; Winter> style 214 Ferric Grey 20" RFT | Aero kit | ESS E-Flash tune | V1 | LCI Rear Tail Lights | Coding completed | Engine replaced at 90K