Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not very helpful - in my opinion

I was not expecting too much about this book, being a pocket book and only mentioning 50 tips on it (as the title states). But, I got less than what I expected! I could only find like two or three tips in the whole book that were interesting, seemingly helpful or "eyes-opener". Nothing else.For me, the only good part is that being easily transportable, I could take it to read at the metro, bus, plane, etc. But again, I do not know many more times I can stand re-reading it.