Everyone is entitled to their opinion and I suppose it's all about your expectations before you purchase - for me, if something is labelled as being advanced fondant, I expect the fondant work to be exemplary.
I understand covering flaws with elements, but personally I try to make sure that my fondant work is done well as I go along, to prevent having the need to have things to cover the flaws - if you get to the stage where you are ready to stack the cakes and realise that in fact, the cake would look better without a fondant ribbon border, then gaping holes at the base would mean you really don't have the option to go without. Also - having a perfect fondant finish makes the rest of your embellishments sit nicer.
Once again though, if you were happy with the classes, then that is brilliant - it's just that someone asked for feedback of the courses and this was mines, you can take it or leave it.