Let me just start off by saying these are super comfortable, they fit perfectly, they are easy to clean, maintain but..
They are not very durable. Unfortunately although getting plugged isn't an option with the way these are designed, over time and use the toe seperator can begin to peel back the top layer of rubber on the sole.
There is an easy fix to this, a strong adhesive (super glue) however, a better approach to this would be to have a third layer of rubber and put the plug between the very bottom and second layer.
Overall these are by far more comfier to wear than my old pair that rhymed with ha-llamas, and I can only give praise to the value for money on this pair.