Microb is much more stable in 2008 than in 2007. The build is much better.

When microb was released for 2007 I switch most of my browsing to it because I found it gave better support than Opera, although Opera was certainly faster. For example, I use gmail and calendar and found they worked better with microb.

Hopefully microb will only get faster as more work is done on the engine by the mozilla team.