First thing that I noticed was the sparkles! I love how the mane goes from darker to lighter and how the sparkles make it look even more amazing! The cutie mark fits the pony very well for it is a diamond and the pony is like some sort of a gemstone. The only problems I have with it is that part of the body is kinda cut off by the mane and how the two stripes are slightly different colors from the rest of the pony. I would say this is a great adopt and I hope it sells well!
Wow, I'm not much of a Brony person but this is absolutely beautiful.
The first thing I noticed on this was certainly the heart. How it's made into a heart is fantastic and I love it! So very creative I must say! The lines have been done very carefully and how you've designed it is brilliant. The stars going down implies to me beauty, love and rest. The colors you have used to make it stand out so much!!!
However, to make it look simply fab, you could like add shading around the edge or try and do a 3D looking on.. just thinking about the way this would look in 3D Makes me think of how class that would be O:!