I am the user that zulu spoke of and probably have the most experience with the device. Ultimately I was dissatisfied as ultimately it did not work, it broke instead. Mine broke about 4 times, they did keep sending replacement parts very quickly - so my experience with customer service would be "excellent." However, pretty pointless if the device itself is flawed, and it is.
The concept of Male Edge is the best in my opinion-by this I mean, extension via telescoping tubes. Much easier to change tension than [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]
SG[/words] or any other [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] I've seen. There are no rods to add, no screwing parts-very simple, just "clip clip". However, like DLD and others say, it is plastic. So they boast that they have 2800g of tension... but you never get to use it very long as after you go past about 2200g, the tension on the device is too much for it and it snaps within a week or two of using this tension. This means with male edge, you need spare parts on hand or it will interrupt your routine (while you wait 3 days for the replacement part). So clearly the thing has flawed engineering and one has to question how well they tested it prior to releasing it.
It will break somewhere on the clear plastic hinge, usually closer to the tension reading area (the red parts that tell the tension). So it is the hinge that is flawed. I also think the telescoping tubes need to lock a little better, they slip, so perhaps a 2nd clamp that locks into place or something. They don't slip often but it's a slight additional flaw that should be addressed. If they made the hinges metal (the clear plastic parts) and made the tubes lock a little better-Male Edge would be the perfect [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] in my opinion.
Ultimately, the flaw of the weak plastic outweighs all the advantages that Male Edge has (advantages: Easiest to adjust tension, easiest to put on, highest tension, lightest [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words]).
Until they fix it, I'd get something else.