I have been using The Flo Ortho mattress for a month now. Build-wise, the mattress is quite nice. Its zero-partner disturbance feature works well; for instance, coffee kept on the bed doesn't spill even with movement. However, the main reason for my purchase was my back pain, and sadly, I've had no relief. I chose this specifically because of the 'Ortho' tag, but it didn't live up to that promise for me. It's a decent mattress, but not the solution I was looking for my back problems.