The Matsonic MS8127C is the exact same board that you get when you buy a K7VZA from ECS, or an M807 from PC-Chips.
The board got reviewed by the usual suspects (Tom's, Sysopt, and many more), and they're happy with it. Performance and stability are in the top range.
What you don't get are extra bits that help overclocking. It's a board made to be simple and cheap, it features no extras over what the KT133/686B chipset has to offer as it is, 1 AGP, 5 PCI, 1 AMR, 4 USB, onboard sound coming from the 686B. No RAID, no voltage, bus speed or multiplier fiddling.
Regards, Peter