It worked very well for me, up to a point. 10 of us owned a 172 together. We each paid 10% of the fixed expenses (hangar and insurance), 10% of maintenamce bills, and an hourly rate that covered gas, oil, and enough for the engine overhaul fund. I flew it more thsn the other nine combined. In the eight years I was on board, three never flew, two flew twice a year at most, a couple flew maybe once a month. I flew once or twice a week. They were subsidizing my flying.
The downside was the spending. One of the guys wanted an autopilot. He flew once a month or less, day VFR, never further than 40 or 50 miles, and wanted an autopilot. He was able to to convince six others to vote for it, so we all got stuck paying for it.
I sold my share after an annual was supposedly complete and the plane was ready for a post-maintenance flight. I drove to the airport and found the inspection plates on the belly open, 13 screws not even finger tight, and a wing root trim strip installed backward. The same deal with the inspection plates had happened the year before. Plus, the plane was flying less and the engine was past TBO. Running fine, not burning oil, but an overhaul sooner than later was inevitable and we didn’t have anywhere close to enough in the bank to cover it.