Just flew EZE-FRA
You have to go to lounge yourself. No fastrack or anything through security or passport, although no queues. Lounge did not notice I go in F despite entering lounge twice, they have separate seating area and seemed to serve a drink and something to eat there. Personally I was fine.
On departure they escort F travelers to the gate but as they had not noticed me I had to go myself. I was fine just wanted to see what happened. Gate is just in front of lounge so really easy and nice. Some confusion at gate why I was on my own and not with the others.
On arrival, we were met at gate, Z58 I think, and escorted to A lounge. What a labyrint. But separate security lane, and not too much queue at passport.
There were 2 travellers probably new to FRA airport and I think they appreciated it. They got short time for drink and snack in lounge before being driven to next plane.