I discovered this product ages ago and have used many bottles over the years. I usually used it as a conditioner (it's a great detangler), so would rinse it off. When my curls started to frizz, I'd put a small dollop (about a ring nail size) on my hands and apply it to my curls, giving them definition again.
As with all products, I am sure it can become heavy if you use too much of it, which I suspect is what happens when you use it for blow drying. As someone who never blow-dries their hair, I found this a perfect leave-in product.
I would recommend this product to Caucasian ladies as well as those "of colour" (sic) as it seems to work for all hair types.
It does smell slightly like eggs, but it does the job and is very cheap, so even if you don't like it, you won't be wasting a lot of money! :)