i Sat mine yesterday and it was all fine, i did the grey square which i was able to work out after 10 mins i was 15 seconds behind the guy next to me so i just kept counting in 12-15 after i heard him press it and i passed that fine even though i did accidentally press the button when the square wasn't there twice.
The picture one is very quick and i was unsure if i passed that one, but that was okay.
Then the 2 hand one, well this is horrible to be honest i thought i failed, you get the same shape 10 times and every time at least once or twice i went out the shape.
The MMI is an hour long interview about 6 questions so that can be quite mentally challenging.
All in all i passed the 3 tests and i am waiting for the MMI results.
Hopefully i hear back soon, and good luck on Wednesday!