I have had Stellar Double Rose in my garden for 2 years now. So far I have been happy with it. SDR bloomed smack dab in the middle of July for me last year. I have it in a primarily full sun garden. The scapes were definitely tall and had about 2 weeks of blooms. There were probably 4-5 fans last year and I had 3 scapes.
This was the first bloom on July 12:
This was it the blossoms looked like 5 days later:
It is definitely pretty and commands a prime spot in my garden.