I just bought my first TRX at Idea World 2010. Although I am a TRX Master Trainer, I have only used it inside Crunch.
This weekend I was able to take my TRX with me to Crissy Feilds. After a 3.5 mile run and a coconut water, I hooked it up to a pull up bar and completed a leg, bicep, tricep, and core circuit in about 25 minutes.
In less than an hour I had a full outdoor workout and despite my foam rolling, static stretching, and hot tub soak; I am still feeling it today.