Well. This was... not good. 
 The worldbuilding was this bizarre combination of really intricate and specific details that were at times incomprehensible. There was a lot of complexity at work here, but it was not really pulled together in a cohesive way all the time. I don't mind a bit of a learning curve, but only if it's because this is all very well thought out. I'm not convinced that Russell wasn't making up half of it as she went along. 
 And what's worse is that I didn't really care either. The lore was intriguing, but flat. The characters at best filled molds I'd seen before and at worst were totally flat as well. The plot was tedious--at one point I looked at the page I was on and actually said out loud, "Oh god, I'm only halfway through this?" 
 I knew from the first time I sat down to read this that this book wouldn't be anything revolutionary. I've seen Rho get flack for being a Mary Sue, to which I say--please love yourself and stop hating on Mary Sues. I was determined to enjoy it as a fun little romp with magical space princesses and ridiculous love triangles... And the first half probably was actually enjoyable in a trashy kind of way. But it really does get bogged down in places and I just did not care about anyone or anything that was happening. 
 So I suppose the question remains: who would actually enjoy this? I'm hesitant to recommend it to new readers of sci-fi because of the arbitrarily complicated worldbuilding. But more experienced genre readers might get tired of it. My best guess is: if you're new to sci-fi, are really into astrology and don't mind love triangles go for it. Otherwise I wouldn't bother.