I've used it once just to test it. I brewed a hefeweissen recipe, split it into 3 gallons each and pitched T58 and WB06 for comparison's sake. I picked up some spice and pepper from the T58 when I originally kegged it. I haven't tapped it yet though, the WB06 is on tap. I figured the Belgian strain might prefer some maturing, versus the true Hefe which was ideal fresh. the T58 was the first to take off after pitching. I had rehydrated both. It was actively fermenting within 4 hours. The WB06 was about a half day behind. Both packs were purchased the same time and I recall they were similar dates, but I don't have any notes on it.
My father says, "hobbies are supposed to cost money".