I'm definitely a plain edge person, having lived nearly half a century without even coming close to having to slice open a seat belt. Maybe I live a boring life. I'm pretty sure my EDC Ritter mini-grip would do the job if necessary.

Campmor.com used to sell a Victorinox One-Hand Trailmaster Swiss Army Knife that had serrations on the tip half and a plain edge on the handle half. I bought one but never really liked it for two reasons:

>The blade always felt too thin/long and kind of sloppy - wiggley (hard to explain)
>I didn't want to dull up the serrations since I didn't know how to sharpen them (pre Sharpmaker days)

Campmor currently sells a One-hand Trekker, which looks very similar.

I think the Victorinox Fireman One-Hand Opener listed on http://www.knifecenter.com is a similar knife, with the same serrations, but with an added seat belt cutter blade (has a dull point).