I was on the edge of my seat through out most of the story. I hoped Harry would pull it off, but I just couldn't see the *how* of it and your conclusion was brilliant.
How you wove your story with canon details (and the added details of your own with the flowers and the time turner) were amazing to me. I really got to see into the window of what was happening at Hogwarts during that seventh year and it was greatly appreciated. How you showed what Snape had to endure just touched me. Awesome story.