CWDM or DWDM passive add/drop muxes

[Greg Schwimer <gschwimer () godaddy com>]

Does anyone have any experience with GBIC-based CWDM and/or DWDM optical 
add/drop muxes (OADM)?  I'm presently looking at the Cisco product lines 
which combines GBICs with passive multiplexors and am curious as to 
alternative manufacturers and the experiences other might have in these 
types of products in a metro application.

TIA,
Greg