It's not the experiments that are evil, really. It's the write-up. Last year, labs ran 1415-1705, and then the finished report had to be handed in by 0915 the next morning. This year they run from 0915 to 1205, and have to be in by 1515 the next day; more time, sure, but the labs are much harder and more time-consuming!
We actually had a pretty good experiment this time. We've got a pair of small, clear tanks, linked, each with a level control gauge. A pump drives flow into one tank and there's an outlet pipe on the other. We have various level control gauges and a level control system linked to the pump. We had to study the system's response to an impulse (pouring a load of water into a tank quickly) when uncontrolled, using proportional control, and using proportional-integral control.
I think the best bit was using the graphing machine; it made such pretty graphs showing the response!
If you believe everything you read, better not read.