I use it, have had it in the M for 6k miles now. Will put another 1k on the car, then send the oil to Blackstone Lab. Will report back afterwards.
Current: 2008 BMW M3 Sparkling Graphite/Bamboo Beige/6MT. 1999 BMW M3 Techno Violet/Dove/5MT. On the list: BMW M2 Long Beach Blue/Black/6MT