Just purchased this myself (Saturday night), directly from PMDG though. I ran into one ambiguity with aligning the IRS, but quickly figured out the correct procedure. The manual titled "Normal Procedures" tells you to set the IRS knobs from the OFF position, to NAV, then to ALIGN, but the "Aircraft Systems" manual gives the correct procedure of "OFF" then "NAV" only. Other than that flew two flights and made 2 horrible landings (par for the course), at least we could walk away from them. :(