While I work on eSWT implementation for S60 or series 80 platforms I use CodeWarrior. But recently this has changed with the Carbide C++. Carbide C++ is the new IDE from Nokia for Symbian OS based C++ development. Carbide C++ is based on CDT project and not only provides the comfort of a modern IDE but also comes with the familiarity of Eclipse. I am amazed that although I have never used CDT before I never had a moment that I felt lost. A big thanks to CDT and Carbide team for following the Eclipse practices closely. I can not really judge the case for WTP myself but I just hope eclipse users are getting a similiar familiarity when they start using WTP for the first time.