Mine cracked last year, near the bottom of the down-tube.
Orange replaced the front triangle and resprayed the whole frame, my choice of colour. The local bike shop and I split the bill for stripping and rebuilding as Orange wouldn’t do it themselves and wouldn’t pay anything for workshop time (apparently some other manufacturers do compensate shops for this).
The idea of low maintenance single pivot was definitely part of the appeal of the bike as I ride Calderdale all year round in all conditions, but I guess I could have had a lot of pivot bearings changed on other bikes in the same time I was without the four whilst Orange replaced the frame (over a month).
Otherwise it’s been a great bike; I have a lot of fun riding it, like the look of it and it’s nice to support local industry / have a bike made in my home town.
So not an Orange die-hard, but very happy with my Four and I don’t really think about the frame issue. If it happened again I’m sure I’d think differently but for now at least it’s not something I worry about.
I’d say get one if you can find one for sensible money.