Make sure you don't rely on following the arrows, either: they're pretty misleading, since the arrow pointing to the right doesn't mean "turn right" and the arrow pointing up to the stairs doesn't mean "go up the stairs".
In a stunning lack of facilities in this new area of the terminal, there's neither an escalator nor any signs to a lift for business class passengers wheeling a roll-aboard bag to get to the lounge.
After heading up the two flights of stairs with my carry-on bag, I was equally amazed to be greeted by only a grunt and a dismissive wave towards the boarding pass scanner, which is on the far side of the lounge guardian's podium, so invisible to passengers climbing the stairs.
Perhaps Lufthansa's own frequent flyers know the procedure -- and are used to a lounge attendant who simply grunts and waves -- but to my mind that is unacceptable, not least at an airport where partner airline frequent flyers (who may not be familiar with the process) are also found in abundance.
Inside, the lounge itself was small, monotonously grey, and dimly lit with fluorescent lights when I arrived in the evening, with only 36 armchairs in squashed back-to-back rows of two. And this is supposed to be a premium offering for an aircraft that holds 98 business class passengers.
Not having enough chairs where business travellers can sit comfortably with a laptop to await their flight is inexcusable in a business class lounge for an airline's flagship flights at its flagship hub.
There are only three small desks with plugs making up the business area.
I saw numerous people trying to balance a laptop precariously on their knees while sitting on a regular airport departures lounge seat.
Wifi speed was superb when the lounge was virtually empty, at 12 Mbps down and 14Mbps up. No worries for slurping down a movie from iTunes for the flight or sending off the enormous files you've been finishing in the lounge.
But speed dropped significantly when the lounge started to fill up, ending up at around 4Mbps down and up.
This isn't a lounge for relaxing, unless your idea of relaxation happens to be sitting on a plastic seat that you could find in the rest of the terminal.
This lounge is new and specifically aimed at business class passengers on a flagship aircraft (the A380) on a flagship route (to Singapore) at Lufthansa's flagship hub (Frankfurt).
The lounge measured up very poorly indeed to Lufthansa's competitors Emirates, Etihad and Qantas on the route, and even to other Lufthansa Business Lounges -- like the excellent one at Munich, for example.
Overall, it's very disappointing: small, grim, crowded, noisy and under-equipped.
About John Walton
Aviation journalist and travel columnist John took his first long-haul flight when he was eight weeks old and hasn't looked back since. Well, except when facing rearwards in business class.