For the 2.2.x branch the WFS module seen a vast improvement in quality, particularly with regards to compatibility with different server implementations including MapServer, Ionic RedSpider and GeoServer.
The wfs module is stable but more testing is always required. Operability with other Servers, such as Cubewerks, need to be tested and debugged.
Gold Star Quality Assurance Check
IP Check: review.txt added, all headers are in place
Releasable: no blocking issues, etc..
Quality Assurance: 40% line, 32% branch coverage, as reported by cobertura
Stability: API changes planned. WFS 1.0 support needs to be ported to the framework used for 1.1
Supported: Documentation outdated, module maintainer watches user list, answers email.
The uDig project makes use of the GeoTools libary and provides the following issue list.