I disagree that XCSoar thermaling assistance info box is hopeless. It is in fact working perfectly 90% of the time. Like John, if I stay focus I can do as good or better than the thermal assistance, but if I let myself loose concentration (usually when talking in the radio or focusing on something else) the XCSoar thermal assistance helps me getting back to the core in one circle 9 out of 10 times. The nice thing about it is that it does not replace your moving map, so you can see both your zoomed in circles and the thermal assistance info box at the same one, and have all the information you need.

Ramy