Being an owner of a Plus Six I can not comment in detail on the Plus Four series. I can tell you that in 14 months of ownership of our car it has either been at the dealer ( mostly) or at the factory for over 8 months of our ownership. We have totalled over a A4 page of repairs being undertaken including the brakes and radiators ( 3rd one on our car ).. To be fair to Morgan and the dealer they have looked at every fault, not always fixing the issue though.
I think upto this present manufacturing year if you purchase a Plus Six or Four it will be pot luck if you get a car that is either fault free from the factory or you will have issues ( hopefully to be sorted under warranty ).
The positives of the CX range : They are genuniely nice cars to drive.. suspension, autobox, engine etc are good.. When they work they work well.
The negatives : I think upto this MY there is a question ref overall quality control on the finished product from the factory. There also appears to be common issues experienced by owners, which points to either a lack of pre production design testing or the quality of items used in the cars construction. In my comments I have noted " upto this years manufacturing year". The reason I say this, there does appear to be a step up in finish from this MY, the unknown question has this been applied to the overall car?, only time will tell.
I know I am going to get some flack from CX owners ref the above.. but it is how it is.. some owners will have had trouble free cars others not.. We unfortunately have had a major amount of faults.
We owned a Roadster prior to our CX purchase.. It was a nice car but also not without a few niggles.. With time I found the clutch was too strong and the gearbox ratios not that great.. We also had to fix sagging rear suspension etc.. These were some of the reasons we changed to a Plus six.
Would I purchase another CX series.. maybe, maybe not. I certainly would not purchase a used Plus Six without a good warranty.. I would also try and use it during the winter, so that if there are issues they are fixed before the summer.