mobile

So Im new to Samsung but not new to Rooting and Roms but somehow I had a boo boo. So I was gonna reinstall the stock firmware. Im curious if which way is the better way to do it. The kies method seems a little shaky but is official samsung **** while odin i am not too familiar with. Have any of you had to reinstall stock firmware. If so, which method did you use. Any help will be appreciated.