If you fit the cleats yourself, make sure that they are tightened up sufficiently, otherwise you'll find that the cleat stays fast in the pedal & your shoe just turns & doesn't unclip
luckily 'my friend' managed to get home & stop at the gatepost without needing to stop & have a clipless moment, but he then had to unfasten his shoe & leave them fastened to the bike until he had a screwdriver to release them. I, sorry, he them tightened them up & they worked fine, but apart from that, no other clipless moments in 10 years & many thousand miles.
On my single speed I have M324 pedals, as I use it as my pub bike & dont always want to wear cycling shoes, but I do prefer to be clipped in