I love the 747 as well, and very much enjoy flying LH's 748.

However, LH has had numerous strikes this year the union for their ground handling staff (ver.di) with short notice. Earlier this week, the LH cabin crew voted to authorize a strike as well, though no dates are set on that. At the moment, there is every reason to believe the strikes will continue.

When the strikes do get announced, getting help from LH is not the easiest based on the LH forum (long hold times, IT that theoretically should let you self-service but often doesn't work).

If you book LH, I would recommend booking via United as an 016 ticket. That way if a strike does get announced, you are able to contact UA (rather than LH) to get it sorted.