Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Big Let Down

For all us Lammle lovers, who passed the CCNA with his book, this book turns out to be a serious let down. I passed my CCNA reading Todd Lammle is book and didn't have second thoughts buying this product for CCNP. I was in for a big surprise, I realize that Todd, has a tendency to over simplify the stuff for beginners and therefore was better suited to write for CCNA. Not only there are typos in this book but it also lacks in depth explanation and has little insight to any topic covered.