Can someone tell me if it is beneficial to purchase in advance the drink tickets

I've heard various opinions on this. If you drink much alcohol, especially at the bars, it is probably worth it. If for soft drinks, I've heard mixed reviews - perhaps if you drink lots of pop! I'm not a drinker (either booze or pop) so can't answer for sure. Check thru the other cruise lines' topics - this has come up several times, with several people answering.