I have now been wearing a CB 3000 with the spikes since !st April 2004 it is very comfortable I run 4 times aweek wearing it and even go swimming wearing it my Mistress with whom I live with has told me from day one she had no intenetions of ever taking it off,for health reasons I am milked around every 4-6 weeks.I can only reccomend this device for all males.