I purchased the RYA day skipper course through NauticEd but I found the training material on the website to be 1) not aligned with the material in the RYA course, especially the way it is organized and 2) I found the practical exercises and the answers for questions to be really average in several instances. For example, an answer would be provided with very little detail on how it was derived, thus making learning difficult and slow.
Overall I would recommend using a different provider or a classroom-based course.
I really found it frustrating trying to learning and felt disappointed in the whole program.