Sony DRU190A need some advise burn on dvd r dl or dvd r dl

I have a sony DRU190A i bought about a week back and well i do alot burning on DL and i was wondering if any can tell me if i should either burn on dvd+Rdl Or dvd -R dl
thks alot

As not all standalone player can read -R DL, use +R DL only. It is also a good idea to use Verbatim +R DL media only to avoid trouble.