I have had the same for my Jackson SLSMG Super Lightweight. The guitar and the case weighed a total of 8 kilograms. The guitar was probably about 3kg and the case 5kg. I have moved internationally a few times with them, and it was so easy to carry around airports and trains. I would have liked a closed compartment inside, because I'm afraid anything I put inside will move around and scratch my guitar's finish, but now a days I just put nothing else than the guitar inside.
I had to walk from a rehearsal studio to my flat in Finland, in winter, at -25 celsius degrees with a regular guitar case and a Jackson RR2 years ago. It was 5 kilometers. I nearly cried due to the pain in my arms because that case was probably 10 kgs alone.
Not with the Jackson case. At 5 kg it's very light, and doesn't feel like a wooden coffin with a child inside.