My experience of club hacks was that the defects were only sorted when the aircraft went in for routine maintenance, minor defects were never rectified in between. I supose old aircraft will always have something wrong being used all the time. One aircraft I had booked, the vacuum pump had packed up. I was told, no problem, the weather is VFR. No way was I taking that. I got so fed up with it, the only way forward was to join a private group where any defects are sorted as they occur, and it's a lot cheaper to fly per hour once you have parted with the initial outlay.