Effective, but not perfect
I got the medium size b/c it was the only size available through amazon that offered the straps that didn't cross in the back (to ensure my shoulders weren't bearing the weight). I'm 5'3&#34; and my pre-pregnancy weight was 128. I'm now in my 31st week with twins and am up to about 158lbs. Though the cradle is advertised to begin at a weight of 150, I had to start on the middle of the 3 waist settings offered for a proper fit. I've now outgrown the middle setting (comfortably) but am not big enough for the last setting. Despite this inconvenience, I noticed an immediate difference in my fatigue level upon wearing it and have had less strain on my back. It hasn't eliminated all my back pain (which is a bit more severe than is common), but I wear it everyday and know that it is helping. I don't mind that the straps show through all of my clothing b/c I didn't purchase it to be fashionable, but to help me to have less pain. It serves that purpose well and I'd recommend it (as my chiro did for me) as a prophylactic for pregnancy back pain as well as after you're presenting symptoms. Know that it might be an awkward fit, but effective for its main purpose.
Rating: 4 stars