These guys bailed me out! After another plumbing company pulled a no-show, Johnco came in and got the job done (and I didn't have to take another morning off of work). The technician (Jason) was courteous, quick, and explained that my garbage disposal had done its job, but that it had just reached the end of its life. he was prepared with a replacement, and was able to swap out old with new in about 45 minutes. He also walked over the warranty information, and how to ensure I got the full two year warranty.
After missing a morning of work and being a bit upset, Johnco saved the day. Highly recommended!