he/she will get the same benefits I get when I fly LH in coach as a *G:
priority check in; 3 suitcases of up to 70 lbs each and if flying international you get lounge access; no priority seating.
You can get an exit row if you pay for it; cannot get it for free even at check in;
Sometimes if you ask very nicely, the check in agent may give you a preferential seating.