(30 Nov 2021, 12:39 am)Train8261 wrote Tbh they don't seem suitable to the route.
Reliability issues with second hand stock does not mean they're not suitable for the route. They're arguably the most suitable vehicles for that sort of route (Stagecoach operate the exact same vehicle type on similar services, and Megabus work, without anywhere near as much issue).
Part of the reliability issues is possibly down to GNE engineering still getting used to them, their common problems, and likely having to consult with Volvo on major issues. They're unique vehicles within GNE (possibly also within GAG?), so it's not as if they'll have mountains of spare parts lying around either - and the wait time on parts at the moment is lengthy I'm led to believe.
(30 Nov 2021, 9:19 am)Train8261 wrote If they were to be replaced. I'd say something like the
Volvo B8L ADL Enviro400XLB would be a great fit to the X9/X10 (that's if the coaches ever left)
No they wouldn't.
A Scania powered MMC or the 6 cylinder Streetdeck would be far more likely, and suitable, options.