Yes, it was a clear success. It not only did they improve the education of several children and gathered valuable information on how we can try it better next time, they also scared an oligopolistic industry into diversifying their products and supplying several needs that were ignored.

That said, OLPC was extremely ambitious. I don't think they achieved any of the project's objectives. They get a lot of criticism because of that, and it's all ridiculously unfair.