Thoughts on Narada Bhakti Sutras?

To all the fellow ex-devotees who read the Narada Bhakti Sutras, what is your opinion of it? At first glance it might seem like a very "open-minded" scripture that is promiting love. But as we know, that's the usual trap with Vaishnavism.

A person very close to me got the book and is starting to read it. Any advice?