How stable is jffs2 summarize option?

[Thorsten Mühlfelder]

Hi,

to reduce boot time of a device I want to use the jffs2 summarize option on my 
root file system. Currently 'm using Linux 2.6.24 on that specific device and 
the summarize option is marked as "experimental", so I wonder if it is stable 
enough for a productive system?
Are there any well known devices that use this option, too?
Do I have to use a newer kernel version?

Thanks for any information