For the time and energy I spent to install the Release candidate for Europa, I must admit that paying a few dollars for MyEclipse is definitely the right investment to do (although I am still missing a complete installer for Mac OSX, and a GlassFish/MyEclipse co-Bundle that would be installable in one shot).
I enjoyed the JSP editor (and renderer), as well as an extensive JavaScript support that should play well with our Ajax jMaki components (that are also available for Eclipse).
There...