I make machines up for people as a business on the side, and thought Id see what these Soltek mobos do. I had the same problem as you after unlocking a T-Bird, so I put a known unlocked one in and it still didnt work. After about 20 seconds thinking about the problem, I saw a jumper right near the dip switches which wasnt in the manual, so I changed it, and wal-lar, the little multiplier unlock LED came on and everthing worked fine.
As for whether the board is any good, it seemed fine, but using one for a couple of weeks can be a different story. But first impressions were 8/10.