Hi,
I bought Giant Fastroad AR1 as my cross, hybrid, fitness, flatbar gravel or whatever you call it bike:
Since I'm MTB guy I use it mostly for road and fine gravel rides with my wife.
I made one small modification: I changed the cassette from the original Shimano 11-42 to Sunrace 11-46 to make steep climbs a little easier.
Stock tyres (Giant Gavia Fondo AR Tubeless, 700x40c) are fat enough for gravel and fast enough for the road.