Looks like it worked well for you.

I am familiar with extractors from working on marine propulsion engines, where you often can't get a drain pan under the sump. While they work well, I somehow always think that opening the drain pan gets more out, even if it is just the drips at the end.

All of this is a non-issue with the new models, however, as they don't have a dipstick.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue