One of the problems for the BV234 was the small operating fleet and limited number of Operators.
Although Trump finally got the 234 certified for 135 ops on the East Coast, they took so long to do it, that the company was bankrupt before it ever got any real use. It was not helped by the publicity from the BAH lawsuit, which was happening at the same time.
Sadly, Columbia lost one of the Chinooks on a Canadian logging job back in October 1997, with the loss of both crewmembers.
Columbia do very well with the machines - but only because of their persistence and experience with the Vertols (no credit to Boeing). When they first took them out logging, they were a very tough ship to keep going, but they made it happen. They are very impressive ships to watch working, but, at least in my opinion, UGLY.