I've actually had much better luck using Paragon NTFS on the Mac side than MacDrive on the PC side. I have a 12TB RAID hooked up to a MacPro via Fibre Channel, formatted as NTFS, and I get 300MB/S Read speed (lower write, but fast enough for my needs). Media Composer has had no problems so far working with this setup (though this is primarily a Final Cut system - Final cut has had no problems either).
Performance with MacDrive has been fairly bad - good enough for moving files around, but not good enough that I'd want to rely on it for a working drive.
--
Jesse Rosen
Director of Technical Development
Abel Cine Tech, Inc.www.bustedskull.com