Im a former Komodo Edit (the free version of Komodo IDE) user before finally switching to JetBrain products. 3 things that come to mind:

* Komodo is built on top of Mozilla app framework. Its lighter in terms of startup time and memory footprint than java based IDE.

* Its search feature is so good that I sometimes use it to find files in my computer.

* Komodo IDE is rather expensive which stopped me from upgrading. Though I think they lowered their prices lately.