I can't tell if Sapphire Nights even still exists. The site says that they aren't updating anymore, and that was some time ago, and on the main page I don't see any mention of it. Huh.
That said, I'm just flipping through the site to see what it says and looking up the books on Amazon. I'm just going through the releases within the past couple of months, and most of them have pretty low rankings--200,000 to over 1,000,000. These weren't released yesterday, and considering many books sell most of their copies in the first couple of months, it makes me wonder what their sales are like. One of their older titles is in the low thousands, though, so it's hard to say, and it's possible they make good sales through their website.
Their covers are hit or miss, IMO. Some are pretty good, and some look really bad. Covers are important to me, so I'd be cautious of going with a company that has iffy covers, just because I'd hate to get one of the bad ones.
I read some samples, and while one was pretty good and I'd probably have probably considered reading it, the others had a lot of amateur writing errors (again, IMO). Not problems with grammar competency, but things like odd repetitions, telling instead of showing, unusual phrasings, and the sort of awkward exaggerations that bring me out of a story thinking "that's not even possible."
On the bright side, they don't have a lot of the language you see these days about how terrible traditional publishing is, and I don't see any myths espoused as truth, so that's good. They're up front with the fact that their print books are only available to order and aren't carried in bookstores.
I've seen a lot worse, but I wouldn't personally submit to them. *shrugs*
