I think they are a ripoff for a number of reasons.
They put fancy names on them to make them sound cool/different, but they are really just a regular coral you can get elsewhere without the fancy names.
It's largely based on colors, but those colors are usually a lie. They grow the corals under specific lighting conditions to get those colors to come out. And then they photograph them under the deep blues to get the most vibrant colors out of them. If you want to run your tank at a deep blue all the time as they did, you can probably maintain them. However, if you run your lights with more white light due to fish etc with only shorter periods if any of the deep blue - the corals will change colors and look nothing like what you bought.
Many of the colors are based on new growth areas as well, so the pictures will often contain a lot of new growth to give the appearance of awesome colors. However, when the coral grows out, the main colors will be the majority of what you actually get. Like I have a micromussa, and the colors on it when it's a new growth are amazing with a variety of colors, green, red, blue, and yellows. But that's just on a new head, when the heads mature, those colors leave and it's mostly just red/blueish. Yet I could easily take a picture of that new growth, charge more and pretend it's something it's not, and this is common. You are getting what you ordered, but what you ordered and end up with is just like that one you already have often times.
Not to say all colors are a lie. The new growth is always going on, so you get those nice tips, those colorful edges and so on(when you don't lose them to lighting differences), but when they get bigger it's just not as much. The bigger colonies often look a good bit like others.
And I'm at the point where I want big colonies, not a frag tank.