Pretty excellent episode. It was pretty touching when Applejack didn't get the prize money and she doesn't want to disappoint Ponyville so she has to get some money. I love every scene in this, the Derpy scene, Pinkie Pie doing what she does best, that Lucy scene, and the epic chase scene. That ending was pretty funny when Rarity has to put up with Pinkie's non-stop chit-chat.
That Derpy scene kinda feels a bit too forced. Don't get me wrong, I love that scene when it appeared, but looking at it right now it felt like it's too much fanservice, like ponyfans are going ape pomegranate over this. I'm surprised they named her Derpy and not some other name, they used the fan name.