Product review (4 stars): Does the trick
We were starting to get a slight gas smell when our Kenmore oven was operating and it wasn't igniting quickly/cleanly (making a bit of a "womp" noise).  Replacing the old igniter / burner assembly was pretty simple.  All done from the front and didn't need to shut off the gas.  The oven works properly again.  Average home handyman can do the job.