Stand alone loggers

I am looking at stand alone loggers for collecting flight information, OLC, badges and possibly state record attempts. I plan on interfacing to an Oudie.

Any feedback from folks that have used either the LX Nano or LX Navigation Colibri II?

The Nano is a simple 'black box', ~$65 cheaper, and advertises longer battery life.

The Colibri has features that would allow it to be a backup vario and simple navigation device, via WP's, if power was lost to the Oudie.

Is the battery life as advertised?
Interface to the Oudie easy?
Other comments?

Thanks

Ron Gleason