I love Marc by Marc Jacobs flats, but it’s hard to find good ones since many styles have too much hardware, just aren’t classic enough, or resemble mice. One surprising thing to note is that their sizing has changed as of Fall 2011. MBMJ flats used to run half a size small. Now they are true to size. I can’t speak for Marc Jacobs yet.
These are my newest MBMJs, style 615187 in red leather. I love the polka dot lining. MBMJs are also usually soled in rubber already so you can get some wear out of them before you have to visit the cobbler. Buy here.
The best sources of MBMJ and MJ(*) flats, on sale: