Mylar vs Seal-a-Meal

Question: has anyone done cost-comparison and effectiveness-comparison between using mylar bags and vacuum sealing with seal-a-meal?

I just called Seal-A-Meal and the lady who answered the phone didn't have any info comparing seal-a-meal to mylar bags. She'd never heard of them. But stated that foods should follow the guidelines in seal-a-meal product booklet:

Pantry:
Cereal - 6-12 months
Coffee, ground - 1-2 years
Flour - 1-2 years
Nuts - 1-2 years

That doesn't seem like a long time. I really need more information.

STOP!

Just talked with the lady's supervisor, Sheila, and she said that as long as you get all of the air out, dry goods properly sealed in a seal-a-meal bagging could last 5-7 years! Thanks, Sheila.

A side note: I will use oxygen absorbers, not in the seal-a-meal bags but 10-15 per 4-gallon bucket. Well, I guess I'm gonna be sealin'-my-meals when I'm over this flu!

Question: Will a seal-a-meal machine seal mylar bags?

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As a side-note, I've broken down and am ordering 26 4-gallon square buckets with lids. I chose 26 so that I can pack 2-weeks worth of food in each - from rice, beans, peas, lentils, gluten-free pancake mix and pastas, dried fruit, spices, tea, powdered milk and eggs, etc. We received a seal-a-meal as a wedding present, and, barring a relapse of the flu, will start unpacking boxes, organizing our food stores, and sealing up 2 weeks at a time.