I consider this stuff to be one of my "holy grail" products. I know this is considered a "lotion," but it has a very thin, slippery consistency, a bit thicker than water. And wow, a little bit goes a long way. A few drops is plenty to coat the entire face and neck, and it absorbs very quickly too - sometimes I don't even get time to spread it over my skin before my face soaks it up! It can easily be layered if you'd like a little more moisture, and in my experience, it doesn't react negatively at all with any other skincare products. This lotion leaves my face feeling wonderfully refreshed, soft, silky and plump.
There's no fragrance or color (it's a clear liquid) and it doesn't leave a residue of any kind either. I got my first bottle about 5 or 6 months ago and there's still a bit less than a quarter of it left after using it every single morning. That's how little you need! I might also suggest applying it to damp skin since hyaluronic acid products work best on already moistened skin, but it's not totally necessary.
As far as where I fit it into my own routine, it goes on after I apply my makeup, but before I apply sunscreen (Biore Bright Milk SPF50) and oily skin lotion (e.l.f. cosmetics Elf+ Clay Mattifying Lotion). No reactions - everything plays nice on the playground I call my face.
Beautiful product! The only downside is I'm pretty sure this particular one isn't available in US stores, so if you don't mind ordering from Amazon (where I got mine) and waiting a little bit for it to arrive, you can still get this lovely item without much fuss. It's absolutely worth the wait! At such a low price ($12 or so, last I checked), it's an absolute steal for both quantity and quality. If you want to work a hyaluronic acid product into your routine, I recommend this one first and foremost.