If you're in between cup sizes, I would be sizing down for this one. I am not sure if the cups are slightly deeper or just more open on top than my other S styles, but there is the tiniest amount of gaping on my smaller side, even with the removable pads in on both sides (which I never wear in my other S bras). It could easily be fixed by tightening the straps, except they are not fully adjustable, despite the website description. Nevertheless, the bra fits well and I doubt it will be an issue. In fact, I think the bigger cups will be handy with fluctuating size throughout the month. The rest of the time I will be keeping the padding in.
The band fits true to the size of my S Syrena and Pl Milady, and not as loose as the S Szykus and S Szafirek (I own Szafirek in a 60 and it fits very similar to this bra). The appearance is beautiful, however if you're not a fan of thick straps - stay away from this one! It has the thickest straps I've seen. The briefs are also very pretty, I especially like the ribbon bow at the back. Like another reviewer, I also found the sizing a bit strange. They were tight to get on and over the hips, but once on they were fine as the waistband sat above the hips.
Overall, I am very happy with the fit of both bra and briefs, despite some small inconveniences. I am quite impressed with the consistency between the S Glamour and S Syrena, as usually I have found that EM sizing is all over the shot.
Updated on Aug 25, 2016