Excellent value for a natural mattress
We ordered a Cocomax futon (the 6" one) and a 2" wool topper from the futon shop. It arrived on time, and it's been great; really comfortable and well made. It's really hard to find an affordable natural mattress, much less a comfortable one; this is the best match I've found in a long time. (And I've looked.) And my wife, who is pregnant, finds she can sleep on her side with this mattress, which she couldn't do before (on a nice innerspring we had).
I was a bit nervous because there are a bunch of negative reviews out there; but my experience was great. I think the negative reviews come from people who've wanted to return the mattress. Buying a mattress online is definitely not a sure thing (even if it's a good mattress, maybe it's too firm/too soft, etc.), and their return policy isn't great (basically, unless the mattress arrived damaged, it's not worth it); but it also makes sense to me why it's that way. As they say, they can't re-sell a mattress you've slept on, and unlike Casper or Tuft and Needle mattress, which are latex and synthetics, these don't roll up, so they're expensive to ship.
But, many of us don't live anywhere near a brick-and-mortar natural futon shop. I think this place is a good option because it's much more affordable than most other natural mattresses, has firm options (rare for natural mattresses), and, because it's less expensive, if you're not sure about firm/soft, you can get a topper just in case without dropping too much extra $$.
But, if you really want to be able to return it easily, get a latex/synthetic mattress from Casper or Tuft and Needle or something. This review is for The Futon Shop
