It was a fast read, but not really a good one. I'm not one to finish a book that isn't enjoyable, and I did finish this one, so there's that. The writing is repetitive - it is not necessary to call it "the lounge that looks more like a library" every SINGLE time someone walks into, thinks about, or talks about the room. Once, maybe twice, is fine - we remember what the room looks like (and if we don't, that's the miracle of the written word, you can go back and re-read it).
The story itself is interesting, nice little twist at the end as you'd expect. All the pieces were laid out, so I can't say I was super surprised by the twist - I was just waiting to see exactly how she placed all the pieces together.
Overall, it's < 300 pages and a fast read, so go for it and judge for yourself.