So long as the speed limiter is aware of overseas speed limits (or lack thereof), i might consider it.
But if it's GPS based, there'll be plenty of situations where it won't work at all, or won't work properly. Several bits of autobahn where there's a parallel section with a totally different speed limit to the main section. Mine is always telling me I'm speeding in an 80km/h zone, but I'm on the 120km/h lanes. heck there's even some bits with a 100km/h in lanes 2+3 and 40km/h in lane 1 for trucks and caravans only. Yes 40.
And roadworks? school zones with part time 20mph zones? Assume my ECU or black box will be aware of school terms and teacher strikes and inset days?
And I regularly accelerate out of danger. Even my driving instructor taught that exceeding the speed limit briefly is safer than braking in many instances. Same with passing trucks in rain. If you can't pass them quickly, everyone will be stuck at 56mph 100m behind them because of the spray (grandad/grandma passing trucks in rain and scared to go a little bit faster is one of my pet hates - put yer foot down, and in 5 second you'll be out of the spray! nope they'll stick to slower speed in middle lane and be getting stressed for kilometres).