As someone who is learning the guitar from scratch (only a month or two into it) and is learning with RS2014, this is exactly spot on. If I had to play songs at 100% and slow as hell right out of the gate I can guarantee I would've already uninstalled and put my guitar back in the case. DD keeps me going. I don't at all mind learning the expanded notes as I gain the needed timing / dexterity. As a matter of fact, it keeps me engaged; the sound is fuller and it's rewarding. I love watching my mastery creep up just a few ticks after filling in some of the previously missing notes! I'm up to 30-ish percent on a bunch of songs and it's starting to actually sound like the songs... lovin' it! My finger tips feel like plastic, but oh well. lol!