My eye is not sure which tulip to focus on, and there seems to be too much yellow in the leaves and vase. I also think a different color background would help the flowers show up better.
Let me say that I really like the subject matter and the overall composition. I don't count off for borders and normally this thick white border would not be my favorite, but it works very well here. The one thing though that I really have an issue with is the challenge criteria. I'm don't really feel that a long shutter speed here really performed what I consider a "dramatic effect".
It is such a nice image though and it defintely does not fall into the DNMC bucket. So, I'd give it a 5.
Details: Long exposures can often create very dramatic effects in photography. Use a longer than normal exposure to create the impact of your image.