Got my new Sigma macro flash today and had a play around. Holding the flash off camera seems to be the only real way to achieve attractive lighting, so I'm not sure whether to keep it or not...

Taken with my new Sigma 150mm, 1:1 (this is my first experience with true macro/flash photography). Slightly noise reduced and sharpened.
C&C much appreciated, I'd really like to hear what people think about the lighting!
If anyone could give me any advice as to whether to keep the flash or to go for something else then I'd also be very grateful!Thank you!

What do you think would be the best option for me? Keep the ring flash (despite the fact that it's pretty pricey compared to a regular flash and that it's difficult to take a decent shot when holding the flash in one hand and the camera in the other), or take it back and get a cheaper regular flash which could be more easily diffused? I'm not really sure how bracket-mounting works - is the just flash positioned a little left/right off camera in a fixed position? How bulky would it make the camera? Is it very flexible? 
