Provisioning and managing TE and L2/L3 vpns

We operate a dual vendor network and am looking for recommendations on
provisioning and managing TE, layer 2 vpns, and layer 3 vpns for
Juniper routers. Today we use Cisco IP solution center for these
functions on our Cisco routers. We have had mixed experiences with
ISC, so we would consider a dual vendor tool. Any lessons learned
from real world experiences on either topic would be appreciated.