Just trust me when you read the story. I was tentative too, the premise being a story about Reinette joining the Doctor, Rose, and Mickey on the TARDIS, but trust me, it is wonderful. For one, it ships Doctor/Rose, without bashing Reinette. She doesn't turn out to be mean or catty. In fact, I actually really like the Reinette in this story. There's no cat-fights or anything like that between her and Rose. Also, it's really cute and really funny, and I'm really glad that I read it.
Different Morality