I have used the pre-treated fabric and printed from my computer. I have also embroidered or hand-printed using the Micron Pigma pen.
In my experience, despite what they say, the pre-treated frabric labels printed on the computer, DO NOT LAST after repeated washings. One of my earliest quilts (early 2000's) was done this way and the quilt has been washed numerous times. The label is now just a blob of color on the back. On another one done that way (around 2005) the words had faded until they were almost illegible. I hand printed over that label with a micron pigma pen.
I hate that the ones from my computer do not stand up to the washing because that would be my preferred method of creating them. I have used Printed Treasures, Bubble Jet set (to treat my own fabric), and several other brands.
However, the labels made with micron pigma pen have stood up to washing as well as the embroidered ones.