Conditioning Tests

I am interesting in doing a Conditioning Test at the end of the summer with my team before we hit the fall practices. I would like to know other peoples opinions if you do one. Even if you dont what are some of the reason(s) why. If you do what kind of conditioning tests do you do? As for myself, I played college football, I am accustomed to running the 110's test.

We did the 300yd shuttle in college, it pretty much sucked. I do not do a test at the end of the summer because I feel like I am testing them a couple of times a week. We do different shuttles and tempo runs through out the week and I feel like I get a pretty good idea on where we are from these. I think a lot of college guys do it because they do not have all of their kids with them over the summer, although the present trend is to bring kids in earlier and earlier every year. Most of my D1 kids over the last couple of years have been asked to show up as early as now and enroll in summer school so they can train all summer on campus. I always stayed at school over the summer to train with my strength coach on campus because there was no doubt I would get more out of it. Good topic for discussion.