I've been long-plagued with coarse, frizzy hair that has no volume up top but never fails to curl and become unruly below. I have to use the highest heat on it to even get it to sit flat. Given that, I've tried out a few products and wanted to share my thoughts.
Macadamia Leave-In Cream
To be honest, I don't feel this is at all worth the price. It doesn't do anything to my hair and will very quickly look greasy if you put more than a dime-size amount. I'm also not a fan of the smell, which is this strange herbally-scent. You're supposed to apply it to damp hair, but I honestly don't notice any difference between when I use it versus when I don't. I can only trust that it's doing what it claims to in terms of protecting my hair from the elements.
It's a 10 Miracle Leave-in Plus Keratin
Dove Dry Shampoo
This is the best one I've yet tried, and from a performance standpoint it's top notch. It gives my hair volume and texture while also effectively keeping it oil-free the whole day. I use it solely on no-wash days. The one issue I have with it is the scent. It's overwhelming, to the point where everyone around me can smell it on days when I use it. This isn't so great for subtlety. The scent itself is a heavy artificial fragrance, and I personally am not the biggest fan. I'll be trying something else after I'm done with this bottle.
Garnier Anti-Humidity Hairspray
This line has multiple products with a range of hold capabilities, and this one, which is labeled as a "Volumizing" hairspray is medium-hold (3 out of 5 on their ranking). I wish I'd gone with a stronger hold, because this just doesn't keep my heavy hair up for more than half the day. Additionally, it can make your hair hard and clumpy if you overspray it.
I do like the scent, which is a very subtle candy-sweet smell. It also works better than nothing at adding a bit of volume to the roots, but again it's not that effective overall.