Yes, I would worry about the financial side and they can only prove integrity and reliability over time. Then again, they are hungry to prove themselves. Being in the yacht transport business is no get rich quick scheme.
On the operational side, I think they have some of the same experienced people who supervised that loading/unloading for Yachtpath. So in that sense, they are not brand new to the game. The bulk carriers they use for their deck cargo space are some of the same that were used by Yacht Path.
As others have mentioned, trucking has its hazards as well. When Gratitude was trucked from Maryland to Seattle, it was wintertime in the mountain passes. The boat got quite a coating of black road slurry. The mast was wrapped but not well enough. It was carried low so got a lot of road crud on it. When unpacked, some of the halyards were too dirty to get completely clean. The halyards were replaced at no cost to us. I'm not sure who ate that cost but the broker wanted to be sure the boat was delivered to us in new condition.
Another friend had a brand new boat trucked across the US a few years ago. He ordered a survey upon arrival. When the surveyor tapped out the hull, he found one place where the core had been crushed by the trailer's support pads. I think the trucking company paid for cutting away the outer skin, repairing the core and reglassing the damaging area. The result was perfect to the eye.
Whichever way you go, you'll want to mitigate your risks and be able to identify any damage.
I hope you'll let us know how your transport went when you get to the PNW and when you make it down to Seattle.