Lufthansa, the national carrier for Germany, has a really high record for being on-time. Of course they do, they’re German with a real penchant for promptness.
Coach class on the older aircraft like the 747s, is cramped. If you can find a way to upgrade to Business then do it! It is one of the best flying in the world today, with a 2 metre bed. Once they start flying that brand new Airbus A380, you’re sure to be flying in a bit more grand style.
Lufthansa is one of the frontrunners if you’re looking for a “global” airline, since they fly to 400 cities worldwide. Their Miles and More programme is partnered with the Star Alliance, so you can quickly add up those frequent flyer miles (perhaps to upgrade to that Business Class).