Macro Ring Light

I like macro side of photography along with other sections of it.
But I have been thinking of getting one of these Macro Ring Flash/Continuous Light.
I have got an idea on them and how they work due to youtube.
But I was wondering if you think it is worth while in getting one of these.
The one I am looking at has got all the adapters so it can fit on most lens sizes.
So if you feel like giving your thoughts on this then please reply if not thats okay.

 

I don't do macro work, so I've never tried one. But I cannot see any reason they would not be a big help.

Kelly