It works reasonably well but it does have a dark area where the flash is coming through the ring. You don't get a nice full ring of light.
It is also somewhat flimsy and the elastic band for one the support rod got off the ring at the third use.
I have been pleasantly surprised at the soft light the ring provides. It diffuses the speedlight just enough to cast an even glow on the face. When doing close up portraits this mod gives a really nice and unique feel to the photos. I highly recommend this ring modifier.
I've used this a few times now & it is a fairly easy quick set up. The magnets that connect & give the ring it's shape tend to be a bit finicky & like to come apart, nothing major just something to get used to. The strap which holds the diffuser (ring flash) to the flash unit doesn't work all that well but, it may just need some time to get used to. The diffuser does an excellent job in delivering a very smooth even light & is a great alternative to anyone on a budget (like me) & not wanting to shell out the big bucks on a true ring flash. Overall I am very pleased with this, I am enjoying using it a lot. It folds up very easily & quickly & comes with a small carrying case, which zips up easily as long as you've folded the diffuser properly.