Sprint PCS has terrible network coverage with frequent dropped calls.  I have been a loyal customer of Sprint for 10+ years, mostly because of a nice grand-fathered plan.  However, many moments of frustration plaque me.  Accordingly, I jumped at the opportunity to review this product (Free Vine Review).  Installation is straightforward, but requires external mounting & some wire routing.  All would have been acceptable if it worked.  Unfortunately, I still experience the same drop rate and poor coverage as without the booster.  It could be due to Sprint network or the fact that my car is a low 370z.  Accordingly, this product receives a 1/5 star.