Rare Beauty says its foundation is "serum-like," and I agree with that description. Its liquid formula melted into my skin, and overall felt pretty lightweight — albeit a touch greasy and slippery when first applied (I've found that it dries down nicely after a few minutes of wear).
With approximately two layers, I could achieve a shining base across my forehead and cheeks. On my chin and neck, however, I noticed that the foundation doesn't fully conceal my acne. Instead, it seemed to enhance my scarring and dry patches.
I also found its doe-foot applicator easy to use, though I worry that it might collect bacteria over time.
In terms of tools, I like how both the brush and sponge apply the foundation. The latter product is much more porous than other sponges I've used and creates a smooth, no-makeup makeup look. The brush is also nice, though comparable to others on the market and not necessarily worth $28, in my opinion.
Overall, I really like this foundation for minimal-makeup days, though I'm not sure I'd recommend it to people looking for everyday, full-coverage wear.