I have Michelin Pilot Road 3 GT on my ST1300 is this tire you are asking about? Also note the Road 3 GT has been replaced by newer Road 4 GT.
As to Road 3 GT I have about 2000 miles on them. I find them to have excellent road feel both wet and dry, really impressed with the wet traction. Keep them at bike recommend pressure. I do not have longevity info but with 2000 miles they basically look brand new. I will move to Road 4 GT when my 3's die a good death.
Keep the rubber side down.