The cryo'd 8300 Hubbells I am experimenting with are not finished breaking in and I can already say that at least in my system there is NO question, No maybe, No who knows, about the fact that they sound better. So much better in fact,that it is like buying new upgraded electronics and the burn in is not even complete. These are not a matter of, well gee I think I heard something, maybe. It is a transformation of the way the equiptment functions, alowing is potential to be realized. It made a bigger improvement in my system than changing the power cord on my CD player, which was a very noticeable improvement, and not just different. The conclusion I have to draw at this point is that the real difference between other members findings who are not sure if they hear an improvment or not but like the higher contact pressure and the construction and my experience with drasticly improved sound is the cryo treatment(which as Lak mentioned, needs to be done properly, no silly dry ice sort of bologna). A good cryo treated Hubbell is available already burned in for only $10 more than the PS Audio which seems well liked here,but does not, judging from the prior postsers results, offer the same performance gains I am hearing from the cryo'd units. Cryo seems to be the key at least at this price point in much improved sound quality, given that the construction is roughly equivilent. Other members have reported sonic improvement that rival $10000 electronics upgrades using the $150 Wattgate. Other members have found the cryo'd Hubbell = to the Wattgate. I understand that the Furutech is a great outlet as well which may be in the same leagur with the Wattgate or beyond. I have yet to hear the results from cryo treating a Wattgate. I have no doubt that the outlets I installed are the best investment, dollar vs. performance, that I have made on my system.