I have significant speech problems and have had therapy. I doubt I would be much use to you since I live in Canada, but just in case, my problems are soft, quiet voice and an inability to find words when speaking, often settling for easier words while stumbling to find the correct ones (as a result I often sound, well ....stupid.) I have diaried the whole process I went through in my blog www.wpgchap.blogspot.ca. Had I kept up with the required practising after 8 sessions of therapy, the volume of my voice would be louder. Unfortunately, I did not. Fortunately, L-dopa has helped with the volume; although, frequently people will still say, "What's that?" or "Pardon me?" or the good old Canadian grunt, "Eh?"
But no help for the word finding as yet. Oddly, when I write, the words come quickly and easily, the polar opposite to my speaking.