Cool shot, I like the lights and darks in this, I really like the detail on the rail, but the brush/shrubbery below pulls my eye away from it and it looks like some of the bottom should be cropped off.
I think the conversion is very well done, but it's a little too bright. Probably about 2/3 of a stop. If you look at the rear-most edges of the posts, as well as some of the flowers, you'll see that there's almost no detail, just pure white. If the detail exists in the original, I'd try and bring that back.