I use the AC adapter as a secondary device in the office, so I do not have to lug it always. It works itself wonderful - but who anstöpselt much peripheral, may run into problems. With me concretely: I hold a full-day training with Beamer, etc. - after about three hours, the voltage collapses and the notebook shuts down briefly from - the performance is back and it starts again - the tension bends again, etc. Until I had only once found that it is on the PSU and not the laptop is broken, I got a good sweat in the presentation. The original power supply that does not happen, already repeated this. Otherwise, this power supply is a purchase but value for the price.
