Really? I wouldn't be so sure. Fenestron on the N3 needs more maintenance than it should, courtesy of issues that the 155 had. And then there is the god awful autopilot. That thing is horrible to fix when it breaks.
The 139 gets good dispatch reliability from people who know how to maintain it.
It is still one of the most simple machines I've ever worked on mechanically. It's just that it's bigger. And once you get used to the fact that the whole electrical system is DC, avionics issues are much easier to sort out. People are scared of it because they think it is hard to maintain. It isn't.
I hope they've checked that the helipads they use are rated for it. They wouldn't be the first operator to buy the 139 and then have to land next to the helipad. LOL.