I studied DL with BGS and had no problems. But as others have said treat it with caution, if you have a full time job and struggle to motivate yourself you may be setting yourself up for disappointment.
I worked half days, and studied the other half, having at least one day off per week so I still had a life and wanted to study rather than seeing it as a chore, and I had no probs. So, in all it took 10 months from start to finish and about 720 hours (I'm sad a kept a log to see how much I did out of interest
). It can be done quicker I'm sure, but thats what suited me.
I know people who had full time jobs, and by the time they had got home, had tea and gone to the gym/pub etc it was late so study was put off or was poor quality and they never completed the course. Make sure if you work it does not take priority.
I also did the CPL part time with minimum disruption to save on massive loans.