Recently, I've been doing a five-minute EDT session at the end of my regular training sessions. It's important not to allow it to escalate into a "rush-reps-and-run-from-exercise-to-exercise-constant-attention-to-time-remaining-metcon-workout". Assuming a decent work capacity and done in a less intense manner, I feel it can be a good way to add some training volume and/or work weaknesses WITHOUT significantly impacting recovery .
The other day, I did the following after a session of kettlebell snatches:
KB Jerks: x10,10,8,12
Total Time: 4:53
Total Sets: 8 sets
Total Reps: 62 reps
Five minutes. Only five, not more.