If you are a person who has never experienced MDR and you just want to see how it works, the Introductory Kit could be a good option for you. However, if you are in a working repair shop, you are not going to be happy with the limitations of having only the basic MDR tool that is included in the Introductory Kit. We suggest that if you are repairing brass instruments in a working shop, you should consider starting out with the MDRS Essential Shop Set Up.