Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fine promise ... not lived up to

I bought this little gizmo in the vain hope that it would do what it says in the description.It works - reasonably well - if you are at home and not movinga tt all - but frankly I don't need it there.It doesn't work well once you are in the car. It works best if I hold it up in the air between the front seats - hardly practical if I am driving!Unfortunately it didn't live up to it's promise.