The necklaces are good, and not too difficult to reinsert with thick gloves as you can stretch them to be bigger. Takes some practice though, best done on dry land with one's eyes closed.Yeah, I used to use a "scum-ball" octo-holder and thought that it was a solution, until I tried to put back the octo w thick gloves - almost impossible. I imagine the mouthpiece design holder is just as bad.
Again, I am about as non-elitist a diver there is, I'll dive any gear that works, but I am a firm believer that all octo holders suck, and its best not to rely on them.