Cisco's Local Director and DistributedDirector

[LourdesT at aol.com]

Has anyone used either Cisco's Local Director (LD) or DistributedDirector 
(DD) for load balancing and/or failover of name servers?  Radware is a 
comparable --- if not better --- product, but my client is sold on Cisco.  I 
am concerned about the reliability of Cisco's LDs and DDs.  Has anyone 
experienced problems with these Cisco products?   

Thanks,
Lourdes