I used DU for three trips - so I guess that means I must have been satisfied the first time!
On the first trip, we travelled over New Year, so didn't manage to get any discounts, but hadn't expected to at that time of year. What was a <b>huge</b> bonus for me was the fact that I just gave my DU agent a list of the PSs I was hoping to get - and she got them all without me having to make any phone calls
On the second trip, DU got me a Disney Club rate for our DxL room, then switched it to a better AP rate, then got such a great deal that we switched for the whole time in DxL instead of half and half with ASMu, because DxL was cheaper!
By the time of the third trip booked with DU, we'd bought into
DVC, so cancelled the DU booking without penalty.
Yes, I'm sure I could have got the same rates myself through CRO, but I enjoyed letting someone else do the donkey work for me (and it doesn't cost a penny). I can't recommend them highly enough from my own experience.