I really liked this episode, though I didn't have high expectations for it in the first place, it was still a nice episode. The story wasn't too complex, but it was nice and I enjoyed it. Troublehooves was a nice new character too. My favorite aspect of this episode, though, was the humor. I actually laughed quite a few times during this episode, or at the very least; chuckled. The harmonica and mob ponies were amusing visual gags, and I thought Troublehooves' antics as a rodeo clown were really funny.
Another thing to point out was Applejack's comment on how the Cutie Mark Crusaders helped Hyperhooves with his cutie mark at the end. I like this idea, and feels like a good basis for the Cutie Mark Crusader's cutie marks. It's a nice concept, and it'd fit them, and it'd be a bit more "special" (can't think of a better word to use) than just a run-of-the-mill cutie mark in something like singing or construction, especially after such a large buildup.
Overall, it ranks third in my ranking of the Season Five episodes so far:
1. The Cutie Map 2. Tanks For The Memories 3. Appleloosa's Most Wanted 4. Bloom & Gloom 5. Castle Sweet Castle