Have just seen this properly all thru for the first time this last week. Then watched it again. Am stoically trying to ignore previous critiques - - cos I reallly like this one. OK there are logical problems with the plot and such, but then we wouldn't have a story would we? Love the song. Really felt sorry for poor Rarity, having been in a similar kind of position - a few years ago I had an idea to produce tube amplifier kits - the design and planning was the most interesting part, but then actually producing the kits was just drudgery. Also in hindsight I was selling them too cheap, so it was like, I'm not getting much out of this.
I'd seen Rarity Investigates some months ago before this, and so wondered where the hell the new pony has suddenly appeared from, (Sassy) didn't even know what her name was! Not mentioned in that story.
Oh and, Moonlight Raven! The Goth pony. Really kinda cute. (When I was first thinking about my Prairie Princess OC I was toying with the idea that she might be Goth, but in case that idea wasn't original I googled for MLP goth pony and sure enough Moonlight Raven came up.)
Oh and, Pinkie Pie's experimental cupcakes - 'cause I think that's all they are - she knows they're horrible but still wants a second opinion anyway, just to be sure. And a third, and a fourth ... I don't have a problem with this scene and am amused by it.
Usual disclaimer, own opinions only.