I've owned an F5 for a few years and use centre-weighted\spot for portraiture but often use matrix for landscape scenes unless there a great range of contrast across the scene. Overall, for most landscapes, I find matrix to be really good.
I might be wrong but I'm fairly sure I read once that the technology behind the matrix metering of the F5 was incorporated (and perhaps further improved a little) into the digital Nikon D3.
It's very good. And I've used it a lot with Fuji Velvia.
That said, nothing beats manual if you know what you're doing and given your experience there seems little point to use Matrix.