my g25 is only a month old, it has been working fine till tonight when halfway through a race the downshift (left paddle) started becoming unresponsive. It still works but I have to operate it far more slowly than I was doing.
Having just played with the paddles while sitting on the desktop the downshifter is still less responsive than the upshifter.
I hope this doesn't require a call to Logitech, getting that kind of tech support normally involves forking out to have it sent off and repaired, and if it is a design fault there'll be no guarantee that it doesn't go wrong again a month or so down the line.