The ottomans/back cushions/overall product itself I would give 4 stars. The firmness and craftsmanship is great - seems like it will hold up well to years of use. I did feel like they could use vecro on all 4 insides to make the configuration a little more flexible and sturdy - but this was an easy fix for us to make on our own. Lots of great storage and having the flexibility to turn our L shaped sectional + ottomon into multiple options for guests - a king bed + twin or 3 twins has made our bonus room more functional than ever! The concept is solid.
The backs of the couches I would give 2 or 3 stars. If you are going to have your couch against a wall, this may not be an issue for you; however, for us, our sectional is in the center of a large room, so the backs were critical. I felt the back itself could be larger - it would be better if it extended the full width of the ottoman and matched up better with the height of the pillows and the base of the ottoman. The hardware that comes with the backs does not hold up to anything more than maybe 150 lbs leaning against it and still doesn't feel super secure or sturdy. With this sectional being in a guest room, we need the backs to hold up to *at least* 300 lb guests - not to mention kids jumping around on the couch. Duobed does have heavier-duty hardware that we requested and is being sent to us. I'll update this review once I see how that new hardware helps improve the product.
Customer service gets a HUGE 5 STARS! Spike has been nothing but helpful and accommodating. Any issues I've had, he's quickly replied and remedied. Shipping was timely, considering the couches are made to order; he was able to offer me a discount that I hadn't been aware of when I first made the purchase, and the new heavier-duty hardware is on its way to us as we speak. I had read other reviews that mentioned excellent customer service, and I completely agree with their assessment.