Not being an artist, I really don't see what's wrong with this picture: I think it works quite nicely. The only thing that seems out of place to me is the horn on rarity's head. It doesn't seem necessary in order to suggest that there's something unusual about the seamstress (her clothing and her assistant do that quite well).
This is just pure awesome. Outside of the fresh and colorful art style, the way you have this character is shades close to one of my OC characters, Lavender Snow. Thank for the spark of deeper inspiration.
this is amazing!! i love the dress that you used, it really fits her style and the boots as lovely. the background pulls this whole thing together and i like the colors that you used. and i have never seen spike like this!!!
i mean, i like the older version that you used and his hair has never looked better!
please tell me that you are going to be doing more!! maybe the other ponies? more Spike? Episode themed? Rarity x applejack?(it's my fav...besides Twilight x Pinkie Pie!) or even the princess?
Amazing! You attention to detail in this is absolutely superb! And you did a great job with the hair; its on of those things I always look at in a picture. Where are these two from though? A show/Manga or something? Because I see it under fan art.