I don't know about their swimsuit quality, but if its anything like their clothes, it's probably not great. The stuff I got a couple of weeks ago were different from the picture. One of my top was shown as white in the picture but in person, they were this tea-stained color. It was also sheer and thin. Another top I ordered was cute, but big even though I ordered a M. This was big while the sheer tea-stained shirt was fitted.
i got this one: in long torso medium (i'm a 4-6 and my torso is pretty long) and i adore it. the torso is still a tad short, but its okay because it stretches out in water. This doesn't have D cup option i dont think, but at a small C- it is very tight up there. I think its best for B cups and less (which I can pass for). I cant speak for all their swimsuits, but the price is good and i LOVE the one i got. Quality isn't terrible- i think because its black, it looks much more $$$. If it was a different color- you might notice sheerness, stitching not being perfect, etc.
I ordered the same one lynnie got and I love it too. I think the quality is good, though I haven't actually worn it yet. I ordered the green gingham and the pink and they both seem adequately lined. I had to get the long torso and to go up a size and the torso is still a bit short on me but overall I'm really happy with it.