Works pretty well, good quality. Cords are my worst enemy, every cord I have that travels with me tends to short out after some time. The power indicator on this block is a convenient feature as these cords usually come In two parts, when my last one died I wasn’t sure if it was the wall piece or the adapter end that was faulty. If this one shorts I’d probably know the issue with just a glance. Used with average ThinkPad R40.