I owned Secret of the Sphinx, just sold it here on Bhuz. (spelled it sphynx, if you're searching).
What can I tell you about it? the quality was superb, I wish it had come with more/better accessories (it only had two puny armbands I couldn't wear because the rhinestones caught on my veil and a heavy veil I didn't like). It was sparklier than I could have imagined. I was a little worried that the gold metallic fabric part wouldn't hold up well, long term (to stretching & sweat).
I sold it because I was losing weight and just couldn't fill out the bra any more even with padding.
Here it is in action, I think it moves beautifully.
(click anywhere on the video besides the 'play' button to open it, I don't like embeding)