Without further ado, here are my thoughts on Double Rainboom.
I really enjoyed the animation because, it really appealed to me when I got to saw Lauren Faust's old works on the cartoon shows that I used to watch as a kid. Even though the plot and story were pretty well, nonexistent I wouldn't worry too much about that.
But, whoever didn't see it yet. Ignore this.
Overall, I would say that I give it a 9.0/10