I did the Level 4 with the OU a few years ago.
It was hard work but somehow (if you want something done ask a busy woman) I got it finished.
I was thinking about progressing to a full degree but I promised myself many years ago I would never put myself through the trauma of exams again and the full OU degree has at least one part that is examined.
Are you thinking about doing it in the future Joshie?