No other device has so quickly and powerfully to start the car! From me a clear recommendation as a boot device!
Super is especially the fact that the manufacturer neither cost has nor effort to integrate a switch for the start help function, which is (due to the high current, has to withstand the switch) rather uncommon, are but when you connect additional security if times a terminal should slip off and would cause a short circuit because the switch should usefully energized equipment before connecting the cables. General makes the device a very solid and stable impression. The rubber in key areas provides reliable protection against slipping and which is very nice as well: The unit is "cubic", which, in contrast to the sleek, high equipment can not fall over, which is essential if you even want to start the car alone. Even with the length of the jumper cable has not been stingy, which many other manufacturers may have a thick (!!!) cut disc.
The compressor I've not really been tested. Clear, which is very loud, but there are now times no silent compressors - have at least no hit and I think in an emergency is the volume not very important. Especially in winter, the own compressor is often the better alternative to the gas station, because there can sometimes quite rapidly the compressed air lines to be frozen and then makes you look at the tires ruckzuck empty. (Always check at the gas station before, whether air comes out before the au part ripe pushes ;-))
The LED light also provides enough light at least in the dark to be able to safely connect the machine or to find his tire valves. The 230V output is a nice addon, I'll probably barely use, but it does not hurt to have this opportunity.
The only negative with the device is used by some previous speakers have addressed a long charging time. Here the manufacturers might still be able to invest a few euros in a more powerful charger, but since you usually do not need the device so daily, you can get over that, too.
Conclusion: I would buy the device immediately.