It's really Great. When I was younger my salivary gland became enflamed and hard like what is pictured. Then my gland became swollen under my jaw to the size of a golf ball and the resulting nerve pain was horrible. I went to a an ear nose throat doctor and found out I had something rare going on. Stones in my salivary gland! Long story short, The doctor ended up cutting the gland open (just a tiny slit under my tongue) and got a stone out the size of a matchhead. I will likely have this issue in the future.