What is your favorite z39.50 server?

There are several recommendations:

1. I have found that AMICUS from Canada is quite good, with MARC-21 records from LoC and the British Library system. It does you require that you register (free) every 6 months http://www.collectionscanada.gc.ca/amicus/006002-400-e.html
• Do you find that there's extensive French language content in the AMICUS records? We prefer to keep our records relatively "clean", so lots of French subject headings, etc. would be an issue for us.
• No, they have the same records as everyone else. Very English. One good thing about AMICUS is that they have taken the British Library's records which are NOT marc and converted them to marc21 and made them available via a z39.50 server.
2. The ‡biblios.net open cataloging service's bibliographic records can be accessed via Z39.50.  Connection settings are at https://bws.biblios.net/doku.php/searching_for_bibliographic_and_authority_records#advanced_searching_with_z39.50
• The sources include the Open Library, LC, the Talis Union Catalogue, contributions by several specialized libraries, and ‡biblios.net users.
3. I always find that the big US publics (Boston, New York, etc) have great records.