Gallery Glass is made by Plaid and is the only glass paint that I have ever tried to use. For me it provides the results I want for the glass surfaces that I use. I just purchased a one paned vintage window which I am going to use to do a piece to hang from my porch. I am anxious to find a design I like, get it leaded, painted and "up" to enjoy.
It takes a little bit of practice, a steady hand for leading, and a lot of little learned tricks to turn glass into some beautiful faux stained glass pieces but well worth the effort.