In principle, I recommend it for purchase, let's see how it behaves in winter, but in general, the device performs its function. Has some pros: The battery on the Superb 1.8 was discharged, when connected, the car started up from the first turn, while the battery level did not even fall on the starting device (4 lights on the indicator remained on). Has cons: Sony Vaio laptop does not want to charge, but it was not bought for this.