Eclipse is not just an IDE.

Yes it is free but IBM spent a lot of time and money to develop the free product !



Right now it is very stable, a lot of big companies are producing plug-in for eclipse, for example BEA is not going to continue with his BEA Workshop IDE, they are going to make plug-in for Eclipse.



You can pay for Eclipse plug-in, myEclipse is a group of good plug-in that is very useful and very cheap.



I used JBuilder, NeatBean and Eclipse but Eclipse is the best one as you have plug-in for everything, for example I start a job that plug-in for SubVersion(Version Control) was need, We couldn't find a plug-in for NeatBean but Eclipse had the plug-in.



Right now is good time for selecting a good IDE and adapting to it, it is Eclipse.