I received a double fan of Big Kiss as a bonus in 2009. It is growing underneath my Kwanzan flowering cherry tree and even though it does not receive full sun, it seems happy where it is at. Branching is close together and the bud count is probably around 10. If I moved it to full sun, it would probably be better.
True to it's registered bloom time as a midseason bloomer, it usually blooms in mid-July in my southern Indiana zone 6b garden. I have never seen rust on BK that I can remember.
This picture was taken on 7/8/14. It has multiplied nicely since 2009, although I don't know for sure how many fans there are now.