I tried a Tabata workout a couple weeks ago, for the first time. I was searching YouTube to find a workout I could do quickly, in about 20 minutes, but that would still get my cardio going. I came across some Tabata workouts so figured I'd give it a try!
With Tabata, you do as many reps of a particular activity as you can in 20 seconds, and then take a 10 second rest.
It was different because I'm used to just going, going, going for a full 30ish minutes. I like being able to take the short breaks, and I felt that I was working just as hard as I had during my usual workouts. I still prefer the longer workouts, but when I'm crunched for time I think Tabata is a great way to get in some good cardio in a short period of time.