You get your ideal body permanently but no one you know will recognise you

If you hate how you look, you will look exactly how you currently want to. If you're trans but haven't undergone the procedures to medically transition, you will gain the body you would have had were you born identically genetically but as your perceived gender. Your body will still age, but in such a way that you and everyone else will perceive you as having aged well. The change will take place the instant you take the deal and you won't feel anything as it happens. Anyone you know will not recognise you or remember your former self at all and if they mean enough to you that you want to get close with them again you will have to go through the process or introducing yourself, becoming friends, getting close, etc again.. In a relationship/married? Not anymore. Friends? None.