If you like very dewy, natural-looking products, this would be a great choice for you. For reference, I have dry skin with some flakiness and texture on my forehead/chin, hormonal acne, and sebaceous filaments on my nose.
The first thing that struck me about this product is just how dewy/tacky this concealer is. I have dry skin, so I definitely find this as a plus- I can set it without looking like the Sahara. Another good thing about the thicker/tackier texture is that it stays in place SO well. I have worn this on a 5 hour hiking trips and every time it looks good afterwards. The perfect concealer to me is able to multitask under the eyes and on blemishes, and this does just that. It's dewy enough to look fresh and hydrating under the eyes, while having enough staying power to stay on blemishes all day. The dewier finish also does favors for blemishes, as it doesn't dry/cake up to emphasize additional texture that may be present.
The coverage on this is also pretty impressive. I don't have horrible dark circles to cover, but I do have a lot of scarring and redness on my chin that this covers really well. It provides a good amount of brightness under my eyes, so I imagine it would cover circles well, too. When you blend it, it doesn't blend away into nothing, and it is able to blend pretty seamlessly without begin patchy or streaky (I use a dense buffing brush). Because of the thicker texture I question if a sponge would blend it as well, but I haven't tried it.
There are 2 reasons why I didn't give this 5 stars. 1. If I apply too much of this under the eyes, I have noticed that it creases (this is without setting, as I don't set my undereye concealer for everyday wear). I have never seen another concealer crease on me (even without setting) so if creasing is a major concern of yours, this may not be a great pick. I was able to just take my finger and blend it out/remove some excess product; after that it looked just fine and I didn't notice creasing for the rest of the day. But something important to note. 2. If it's particularly hot or I'm kinda greasy, it can break up around my nose. While the staying power is great around my chin and undereyes, if there is more than average oil production on my nose I will see this breaking up around lunch time. This would likely be remedied by an oil-controlling primer or setting the product, but this greasiness is rare enough for me I don't do this on the daily. But if you have any sort of oil production, I would be wary in purchasing this product.
All in all, this is a great concealer if you want something super dewy and multitasking for the undereyes and blemishes, just as long as you're careful of over applying and know when/where to set it :)