Agreed it's a great ride. My biggest flag for caution had to do with the bum-rush between the ferries at Cartwright and Blanc Sablon - a 60+ mph, 300-mile rolling caravan / dust-cloud. Alas, no longer relevant with the mid-section of TLH having been completed.
Scenery-wise I highly recommend the poorly-marked, two-track dirt road that heads south starting about 20 miles out of Happy Valley. Terminates at a mile-long hiking path to Muskrat Falls - very nice.