Re: CWDM or DWDM passive add/drop muxes

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.

sorry, no expirience. but the fiber-singlers from allied telesyn looks nice.