I had a chip fixed on my W124, and it looked okay...the original chip was pretty nasty, so I didn't expect a perfect repair.
Most of the shops that do this work charge about $30 or so to do the repair. Some even do it for free if you let your insurance take care of it (as was my case). So why bother buying the kit in the first place?
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car