I have had Sun Panda in my garden since '14. It bloomed both summers here and survived the miserable '14/'15 winter so is very hardy. It has added fans both seasons and should be a good sized clump '16 summer. It stands up well to rain and is a stand out from a distance. Blooms are large and it blooms over a lengthy time for me. I love this one and definitely a keeper for me. Sorry for the fuzzy pic. I hope to be able to upload a better one next season.
Update 2017---At 3 years old, I consider this to now be mature. Bloomed from July 26 - Aug 30, reached 30" {less than registered} with a bud count of 20 with 4 way branching. It has increased to a large clump. Pretty amazing in a northern garden. I love this one. As for color, many others have already finished when blooms start on SP.