I have used coconut sugar, and honestly I am seriously underwhelmed. The taste, flavour, texture really didn't come through for me, but I convinced myself that it's coconut sugar, it MUST be better for me than regular.
The sad thing is, sugar is sugar and it breaks down exactly the same as unrefined sugar. The claim that unrefined sugar is better for you, is in the fact that it hasn't been stripped nor dyed from it's natural form, but just because it is brown, does that mean it is better for you? I really don't think so.