Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Feels immensely better in the rear end..

However I had to pay a shop 75 dollars an hr which took 4 hrs to install.. @_@ HOLY MOLLY WAS THAT EXPENSIVE!!!!The instructions for this product are very very very basic.. Not in depth at all! I had really hoped to give the shop better instructions but these were just so basic they said they mostly did it by guess work..