I tried M.A.C. Strobe Cream years back and found that it broke me out something terrible. I heard similar reports from a good number of other women as well. I can't speak for the new version because I did not try it, but looking at an ingredient list at Spektra.net, I see a number of suspect ingredients, such as Glyceryl Stearate SE, Steareth 10, C13-14 Isoparaffin, and Propylene. So I plan to just avoid trying that one again. I did, however, try the new lotion.
The ingredient list for the lotion is not overly scary, but I did notice that it contains Hexylene Glycol, which is on some lists as a moderate risk for causing acne. It also has Bismuth, which is an irritant for some people, although I have never had an negative reactions to it.
The Strobe lotion is very light. This is quite a contrast to the cream, which I remember as being particularly thick. It provides a nice luminizing effect, that can add radiance to your look as long as you don't cover it up with a bunch of foundation. I like the liquid for just a bit of cheek highlighting when I am only wearing powder mineral makeup on my lower face. I have not broken out from it, but I also have not used it on my entire face and have been restricting it to areas where I don't typically get acne.
If you like illuminating lotions, you might want to check this one out. I does have a very nice effect.