The Trust PW-2770p is stable and the electronics work properly as I could already notice when tested under full or overload. Meanwhile, I have used the device during our three week vacation regularly, with also several times a long time at a stretch. There were no problems. The converter is a bit hot during operation and I have therefore observed during installation, sufficient ventilation.
In addition to the reliability I particularly like the build quality and compact design. Unfortunately there is no on / off switch. The unit could be in my car easily in the center console in the recess of the unneeded and therefore developed ashtray accommodate for rear passengers, so that it is out of the way but easy to reach.