i've never heard anything bad about them. we have events down there a lot, in fact, we are planning another dyno day there right now. if you wanna go, get ya name on the list...there are a bunch that have already signed up. it's open to all cars, not just dsms.
here's the link...
http://philadelphiadsm.com/forum/viewtopic.php?t=5371
from the one we just had a couple months ago...
http://philadelphiadsm.com/forum/vie...=asc&start=180