I haven’t used it a lot but didn’t notice issues so far. In any case, you can go back to 2.8 if something goes wrong.
There’s a PPA that provides GIMP 2.10 if you want to get it updated automatically but there’s a conflict with a secondary package (gimp-plugin-registry) from the Ubuntu repos if you’ve installed it through the Software Boutique (or installed the package manually). See there for mroe infos: When will Gimp be updated to 2.10