Saatva contracts with different regional mattress manufacturing facilities to make their beds. It all depends upon where you live as to what facility will make your product.

To be honest, I am not sure. From their web site they do seem to emphasize marketing. It is a spring mattress. From what I can see is reasonably well put together. It uses a dual coil system, but the point is it has coils. I looked at the warranty, it says 15 years but is actually 2 years. After that you do have to pay for them to replace the bed. This is pretty standard in the Alternative bed market. Warranties are generally scheduled so the manufacturer has little to no required performance, it is profit draining. Based on their warranty, I believe they think, under normal circumstances, their bed will last in excess of 5 years, which is normal for spring products.

If you are looking for a longer lasting bed, For about the same price consider one of the foam offerings, or air technology beds, like Comfortaire. Comfortaire offers a 4 year non prorated warranty on several beds, and a limited 20 year warranty on all their beds. The modular design will make sure that if the bed sags, you will not have to buy a new bed, perhaps parts, depending on warranty, but not the bed. Foam beds like Tempurpedic also offer longer warranties, but are not modular and the limits on the warranties are similar to all bed warranties, ie minimum sag etc.

As Jeff noted, Saatva contracts with various regional manufacturers to make their beds. Outsourcing mattress production to a third-party manufacturer is common amongst online-direct brands like Saatva, Casper, Tuft & Needle, and others.

However, the beds are made to specifications provided by Saatva, so they can't be directly compared to other beds made by those manufacturers. So, your best bet is to look at the reviews of the actual Saatva beds, which can be seen here.

In terms of history, Saatva's products have been on the market since 2011. Although many reviews are written by people that have had their bed for less than a year, there is some comfort to be found in the the relative lack of unhappy customers coming back to report durability problems in Year 4 or earlier.

Of course, four years of data is still well short of the expected lifespan of a mattress, so you won't be seeing any "end of lifespan" perspectives from Saatva owners for at least several years (one would hope). As with any new brand or product innovation, you are taking somewhat of a gamble in terms of how the product will fare over time. One thing Saatva's reviews do show though is that they are eager to resolve customer service issues if/when they arise.

Lastly, for what it's worth, Saatva's history, although short, is as long as iComfort's, a year longer than iSeries, and 2-3 years longer than the recent wave of other online-direct competitors (eg, Casper, Tuft & Needle).