I stumbled upon this today. It's a ride report, article on riding the TLH back when it was first opened. These guys had it tough, and on a Honda Magna no less.
I wish I had ridden the road back then, or at least when it was all gravel. Even though it's paved it's still an adventure for some. Hundreds of kilometres between communities and gas stops, traversing Labrador's wilderness.
Phase 3 is still unpaved and will be for at least a couple of years. If you are sitting on the fence about going, next year is the time to go.
Enjoy the read on the old days of the TLH