There are a couple of multi-tools I'm seeing coming out for AR maintenance, which of these are worth looking at?

Gerber eFECT military maintenance tool
http://www.tadgear.com/edged%20tools/gerber_efect.htm

Samson Manufacturing Field survivor AR15 tool kit
http://www.samson-mfg.com/ar-15_html...-Survivor.html

Multitasker Tools
http://www.multitaskertools.com/info.html