Product review (5 stars): I was glad I bought the kit and not just the belt
Everything worked as advertised.  I was glad I bought the kit and not just the belt.  The old roller on the tensioner looked like it contributed to the belt breaking.  The new roller also seemed to be slightly modified in its shape so as to avoid the type of wear that affected the belt.  It was very easy to replace all of the parts.  I'm very pleased with the results.