This is a tricky question to answer! Kimball pianos sold very well in their day. That being said, they were designed to sell well. This means that they were not made with the same attention to detail and quality as a brand like Steinway & Sons. Kimball pianos were considered an excellent option for use in the home, but were considered to be mid-level in value. Kimball pianos did not typically grace the concert stage, but they were affordable, mid-level quality instruments that were great for learning how to play the instrument at home.   So, to that end, I would answer “yes,” Kimball was a good piano brand.  And, during their hey day, they sold extremely well.