This was the only episode I ever managed to catch on actual TV, so I've always had a soft spot for it.
This a great Rarity episode, plus Spike gets some time in the spotlight too, which I liked. Once again, I liked the attempt of having a different setting rather than just Ponyville. Yeah, the caves and the valley are dull looking, but it's also kind of refreshing in a sense.
I found the Diamond Dogs interesting. They show up, kidnap someone and we literally never see them ever again. They're also completely inept villains, but that's the whole joke, so I really didn't mind that all. Humour is the focus of this episode and it's really good. All the gags made me smile. Rarity was also great in this episode. I loved that she was actively messing with the dogs via her own personality. Always thought that was awesome.
Not much to say here, but this is a great episode I can watch at anytime. I'll give it a 9/10.