LineJet should be viewed with some suspicion.
Although the specific airplane is in reasonable shape, the owners of the company have, apparently in the past, stiffed crew members at the end of the contract.
This is an old ploy to get the crew member to complete the flights then the company claims 'poverty' and refuses to pay.
The usual way around this problem is for the specific crew members to insist on the last months pay in advance.
LineJet has, at least with one individual I personally know, recently refused to do this...a bad omen.
In addition, the owners of the airplane have indicated that it will remain on the US register for a prolonged period.
There is nothing wrong with this of course, however for the airplane to be used in commercial service, a detailed lease agreement needs to be entered into with a foreign AOC holder, and so far as I know, this has not been done.
The old days of operating under FAR91D (as it was then known) are long gone.
One can expect that the FAA will watch this airplane quite closely, at least initially.