Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Happy with product.

Was having some battery problems during winter and thought this might help, it seemed like the actual problem was a cold crank issue with my battery which this wouldnt really work for since my battery was almost frozen solid at around -8F temp. In any case I was able to use this about 5 or 6 times the same month after I got another battery and so far I am happy with the product. Takes about 15 minutes or less to boost up and you can charge it back right up in the lighter port quicker then the AC at home which takes a few hours.just my opinion and so far no issues.