I expect Comac to do a much better job on supply chain support than Sukhoi did. Russia in general has always been troublesome for parts supplies for its exporte

I expect Comac to do a much better job on supply chain support than Sukhoi did. Russia in general has always been troublesome for parts supplies for its exported equipment, whereas China has a much more consumer-friendly culture and is likely to invest heavily in making the C919 a success there. I wasn't aware that China had built much of a reputation for international customer support. The fact that they're building it from scratch when the main competitors are using refreshed old designs of the 737 and A320 might help it achieve competitive fuel-efficiency, but it remains to be seen There's not much to see. The C-series is the one to beat and so far the assuredly optimistic, published specs (per Wikipedia) for the C919 don't come close to the CS300.