Online IQ tests-accurate?

Anyone here taken any of the many free online IQ tests available? I understand, of course, that an IQ test isn’t necessarily a fair indication of a person’s intelligence, but I was wondering if anyone here had taken them and what your thoughts were. My I never had a traditional IQ test, but took three of those online tests throughout the day yesterday. All three were fairly different and scored w/in 5 points of one another.

Ever take one? Any thoughts?