I have nothing but postitive comments about group flying.
I have owned a 1/10th share in a Slingsby T67 that cost less than £3k to buy, £34 per month and £34 per hr (tacho hr,,,,, not Hobbs hr,,,,,better value) and sold the share at a profit.
I now own a 1/5th share in an AA5, cost £5k, £34 per tacho hr and £60 per month.
Monthly charges pay for hangerage/routine maintenance/insurance, flying hr rates include fuel and engine fund etc.
When compared against club hiring costs just NO comparison and far less regulations.
Depends of course on how many hrs per yr you wish to fly,,,,,,,,!.
Of course you could end up with pratts like Mr Tiger_Moth who could cock up the relationship in a group if you are not careful!.