I really do, you can be sure
I allways generate my flightplans with Simbrief. The advantage in the BAe for me is, that i do not need to save/download/export the flightplan anywhere. I go in the FMC, klick on Route Menu and klick on Simbrief. Then the FMC loads the actual flightplan.
This is very comfortable and i have not loads of flightplans anywhere on my system.
But the more important for me is the "Sync"-function. As i said this synchronysis the flightplan with the Sim, so the ATC works with this.