How does your T let you know when the session time is up? Well, my T uses a timer. I don't remember seeing it, although I may have. I think it's blue, but I'm not sure if I actually saw it or dreamt that in one of my nightmares. (LOL)
It dings when time is up (duh, right?). However, that is not always the case. Sometimes, if we've started ten minutes late, then I leave ten minutes after the ding, LOL. I think I told him that I did not like the timer one time when I was a bit angry. I actually think I told him I despised it and that I've had visions of beating it with a club outside on the sidewalk. I've already gotten the feeling that a lot of people here at PC "discourage" the timer, well, including myself, LOL.
I'm getting along so well with my T, though, the timer has become something that doesn't bother me (totally) and/or something that is not big enough for me to bring up. Okay, call me chicken if you'd like. But, at least I'm cooked well done.

DING!