I'll share my own experience for you to draw your own conclusions.
Previously I had a Planet Ocean Co-axial chrono-Cal 3313 for abt 5 yrs.
After the 4th yr I noticed that the watch would stop after being left overnight. Accuracy was still within COSC, though no longer within +2 secs/day when new.
Sent in to SWATCH @ Goldhill. Cost RM 1,600 for complete service. They returned all the parts which included all the hands, crown & 2 pushers, the barrel & mainspring, the co-axial escapement, a few pinion gears and a full case polish. The watch had been used for scuba activities over the years so was subject to knocks, seawater and all kinds of harsh use.
Totally satisfied with the service. Ran v. accurately and looked new.
I sold the watch shortly after with the 1 yr factory service warranty, as I got tired of the orange look after 5 yrs.