I have sent students for checkrides that they passed without problems. I've seen the same students cock up and almost destroy an aircraft (on landing) many hours after they got their PPL.
Personally, I've no faith in my students that they can consistently perform all maneuvers to an acceptable standard. Therefore I am bit reluctant sending them off for critical maneuvers that could easily kill them if they do something wrong (e.g. spinning). Of course, this lack of faith grows away as they gain more and more experience. But still, I would never send off a student for spinning.
Power-off landings I feel OK with, but I prefer if they stop 1000 ft GND abeam their touchdown point. As they gain experience I can let them go lower and start the base turn (500 ft min of course) to let them see if they would make it down. What I am afraid of is that they pull back too much and get low on speed close to ground.