Exterior paint that includes primer with finish coat

Home Depot sells a Behr Premium Plus Ultra paint that in a single can combines a primer with the finish coat. (May be other brands out there, too.) While the concept is certainly attractive, can we expect it to work as well as separate coats? The literature touts nanotechnology in the formulation. What about proven durability? (Since nanotechnology is so new, I wonder what kind of accelerated tests the paint underwent to simulate real world conditions.) Anyone have first-hand experience with this product or other similar ones?
I'm planning to paint the outside of my home. Most of the shingles are asbestos, the others are wood shingles. Fascia boards are a mix of real wood and pressed paper! (Thanks, Levitt and Sons.) The soffits are a mix of pressed paper and exterior and interior plywood. The house was built in 1967 and everything has been painted many times, except for the soffits and fascias that I replaced last week (with real wood).
For the curious: Those pressed paper fascia boards and soffits are dimensionally identical to standard wood sizes. If all the previous homeowners had kept them well painted for the past 40 years, they would have stood up to the elements remarkably well.
Thanks for your comments.
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Ray K wrote:

I painted some bare wood with the semi-gloss version last month. I was very surprised to get decent results with a single coat. As for durability, I have no idea how long it will last.
--
Tony Sivori


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painting bare wood is 2 coats, solid color stain can be done one, Is there a warranty on that stuff that includes labor, no. Alot of new product claims fail and are changed.
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Many old pressed paper wood products did not hold up because the glue became edible by microorgansims especially in the south no matter how much you painted them.

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Ray K wrote:

...
A. Only time will tell. B. It's a new product, only time will tell. C. Probably the standard ASTM tests plus whatever Behr does in their own development. D. Undoubtedly you'll not be the first to actually buy it but since it's fairly new see A) and B).
Asking for something that isn't yet known and won't be for a while yet...
--
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