I absolutely love that you release. My biggest petpieve(don't know how to spell that) is when people don't release.
Your form is good too. You have a flat back and you are looking to where your going. You can't see your foot in the picture so I can't tell if your heels are down or not. You could bring your leg forward a little bit more so that there is a straight line from your hip, to your knee, to your toe.
Overall you look amazing, same with your pony. He has excellent form and nice, tight, even knees. Your pony also looks like he has a lot of scope.
All in all, you guys look like a great team and you work together so congratulations