Works well, some suggestions
I used the app on a recent one month to Paris, and it works well.
Suggestion: The type on the street names is too small and fuzzy on Iphone 3GS. The workaround was to pinch zoom out very slightly and the type enlarges to a more readable level. Its a constant challenge, though.
My guess is that is was tested and developed on an iphone 4 with the new retina display. The tiny type is not fuzzy on a 4, but is still could be a bit larger to make the map easier to use when walking and navigating.
Air kevin about
Smart Maps - Paris, v1.5.1