A negative on the board is it uses a socket for the 3977. Socketing is not recommended by Allegro, the manufacturer of the 3977 chip. One of the significant reasons the chip is not recommended to be socketed is that heat transfer is through the 9 ground pins of the chip. The heatsink shown on the chips is conducting heat through the plastic body. While that helps, plastic (IC package) is a poor thermal conductor.
Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
Vist my websites - http://pminmo.com & http://millpcbs.com