I love the fomula, it does the work wonderfully. I use it more often at night as the last step of my skincare routine but I've also tried it during the day and under makeup. I makes a good substitute for a lip gloss. Though it sits well on my lips, I found myself needing to apply constantly because it easily transfers to anything it touches — never lasts long.
The applicator is unique, it looks like a cosmetic spatula which takes a lot of getting used to. I wouldn't prefer it personally as it does not give me the feeling of satisfaction the traditional doe-foot applicator does.