Been traveling a lot and my Toughbook CF-54 has been serving good. Since projects we do are mostly confidential for specific customers working in intelligence sector - we are always taking OPSEC pretty seriously.
One feature I could not live without is removable hard drives. Every time I have to leave my laptop behind, I extract HD to carry along. This makes machine in hotel room total brick for anyone interested.
And yes, I have not booted Windows since '90's. That's another OPSEC tip.