Well, I can give some advice as someone who buys practically everything online. XD
I took a gander and while the photos seem
to be theirs (I've never seen photos like those on my million ebay cosplay searches, but you never know), but depending on the costume you want, I can't say I'd reccommend them. They seem to use gabardine (a common cosplay fabric) for almost EVERYTHING, even when it makes the outfit suffer in quality. I suppose this would be okay if you choose to buy an outfit like Len Kagamine's, but if you're going for anything like Ciel from Black Butler then I'd look elsewhere. I notce that they also use satin on some outfits, and while it's fairly cheap, satin is... well, it just looks bad most of the time, and it appears SO shiny.
Long story short, I wouldn't buy from them if I were you. XD
From personal experience, here's the alternatives that I can reccommend:
FM-Anime: It takes a long time to get your costume, but they do excellent work, and have wigs of very good quality. Besides slow shipping, the only other con is that shipping costs are rather high, but it's worth it for quality. They have a lo of outfits in their catalog, but they also take commissions, and reply within 4 business days. They are easy to work with, and will give you a list of materials and a price quote when you ask. Their pictures are 100%theirs.
Cosplayflying: I bought a Shiemi Moriyama cosplay from their ebay store, and I received it in the mail just under two weeks later. It's also of great quality, and everything is exactly what was in the picture. Their pictures are 100% theirs. I got a wig with the costume, and it's very soft. It's not the highest of quality (it shed a few hairs when I first opened the package, but has stopped since), but it's good enough. I'm not sure if they take commissions; you can always message them and ask.