It’s not good. Realiq.online is better.
So, I took a good portion of my time out the day for this test. I got a score which was far off my real IQ. I took a professional test with a psychologist and got 135. On the website realiq.online I got 136, so there are certainly many better alternatives. Realiq is based on the methodology JBP described and is better than Mensa’s test. This is coming from a Mensan.