my F32 was the first BMW i've owned. but, in its nearly 3 year life with me it was dead solid reliable - only basic maintenance stuff to do, not a single issue or light. the guy i bought it from cared for it religiously as well and to my recollection of all the receipts he gave me he never had any issues or failures either from new. it has almost 91k on the clock leaving my hands.
i expect similar for this G22! you never really know with all the electronic stuff but the chassis and drivetrain should be solid.
they are addicting to drive for sure. they aren't light or nimble, but they are a lot of fun to toss around.