It’s something I struggle to use, I think. I tend to over-apply, because I’m so used to more medium coverage/buildable coverage formulas! I love when they have a lighter-weight feel and don’t appear caked on, because sometimes you NEED that coverage level.
When they’re full-sized, I like them, because you can often save a little money compared to buying them separately. I prefer smaller brush sets (3-7 brushes), rather than mega-sets, as mega sets often include shapes/sizes that I would rarely use. I’m not a fan of minis/travel-sets in general as they tend to be lower in quality, even though I’d love to see more short-handled options out there.