Seems like nobody in here has actually tried them. I should be getting some this week, so after they get settled in I'll give them a try, which could be challenging. My fear comes from my previous experience with a standard nightcrawler that for some reason went deep and wouldn't come out... then I read these other guys are way stronger than the standard worm, that they like digging quite deeply on harder soil, and that they are kind of higher temperatures.
My expectation is that they would push harder, thus it would feel more intense, but also the little paranoid thought of them wiggling too crazily inside and getting stuck or something! I'd first have to watch how they behave crawling through straws. Now I feel sort of obligated to record the whole thing.