Compared to other MAC compacts, these are actually not badly priced. They retail for about R260 (when they are not in special packaging) and they are so worth every cent.
I currently own 2: Sparkling Rose and Pearl Blossom. I really want to build up my collection though.
They are subtle enough to use as a finishing powder, but can also be built up to serve as a stunning highlight.
They are limited edition and are only available in certain collections. So, do watch out for them and grab them quickly as they sell out super fast!