NTFS-3G is a stable read/write NTFS driver, but it is unfortunately extremely slow compared to both NTFS on Windows, and any native Linux filesystem. Not only is the access itself very slow due to use of FUSE, NTFS-3G does not have near the capability of Windows' native NTFS driver at NTFS's fragmentation avoidance systems. (I suspect use of NTFS under NTFS-3G is the cause of so many complains about NTFS becoming fragmented, because that rarely if ever happens on Windows)
Is there any (possibly nonfree) NTFS driver for Linux that isn't extremely slow?
EDIT: Most of the loads that will be going on inside this filesystem will be VMWare, which is why reasonable performance is particularly important.