Thank you, Jamie, Jozilla, Tykey and icep707 for your kind replies. Yes Josephine I see you, sorry i didn't the other day. I do understand that it is mostly the techniqe of the OS, but the proformance of the inplant is very important to me. My job that I have 20 yrs. to go, before retiring, as a Machine repair tech, consist of walking on hard concrete floors, climbing ladders, climbing in/out of machines, carrying heavy parts and getting into postions ( knees bent up and kneeling ). I have done a lot of research on each company that makes inplants, every one of them makes a "better then the next guy" slogan. But hearing from people that really have the inplants, how well they feel and work, is very inportant to me and finding this site, to hear from the driver and not just the OS and manufactures has set me at ease. Thanks again all.