Which online IQ test is the best?

Have you ever taken an IQ test online?
Before you do, I would like to urge you to not even click on any IQ app on Facebook or any link stating that they give you an accurate IQ test.
Many times, those tests will show your IQ as far too high in order to encourage you and others to share the results on Facebook to give them more traffic.
When it comes to IQ in general, I would like some feedback from all of you.
IF you wish to take the test, here is the official one from Mensa:
http://test.mensa.no/
And then there is another one which has been recommended to me:
http://www.iqtest.dk/main.swf
Did you take it?
How did you do?
And what do you think is the best way to measure a human being’s potential?