I finished a DL course with OAT earlier this year, and as the previous post points out, you will need a lot of self motivation and determination. I was working full time along side evening studying, and it took me 15 months to complete the course. On the other hand, it was fun and in the end it was worth it, I got first time passes in all 14. Suppose it depends on your circumstances, the time frame which you want to complete them in and also your ability to motivate yourself. Have fun
