T3 backbone stability

We are cutting over to use the T3 backbone now, and I am concerned by the several recent messages about ENSS and CNSS problems. Could someone at Merit summarize some of the recent outages if there have been trends, or could some of the other midlevels provide us with some insight as to how (in)stability has affected your connections? We are going with the emerging standard of send T3 stuff to the T3 and T1 stuff to the T1, explicitly importing T3 routes and defaulting everything else to the T1. thanks, dave o'leary SURAnet