Recently I switched from a U-lock on this Castle Brug guard after I lost my key for the old. The advantage of this course: combination of numbers. This is easy to adjust. At the detent is a small lever that we put aside. Then you can set the desired combination and put back the lever. If the lock is engaged is concealed also the lever. However, the lever is located on a little slack. Therefore, I sometimes worry that he accidentally turns when open and then a wrong combination is set at the end that I do not know. After a bit of trial and error but I have found that I have for it must be very unhappy. Resistance begins a bit later, but it is there. For a little more sense of security I'd recent Stern also awarded.
The light at the number wheel is of course very convenient in the dark! The button for turning on and off is covered by a cap and must be kept pressed. The meaning of the cap I can not judge, probably against dirt and protect the bulb. However, it is not attached to a clockwork or the like, but it stuck. If they thus lose the go, it's gone!
Otherwise, the number wheel is easy to use and the lock snapped good and easy one. This makes it a lot better than my U-lock, which I have brought up at the end with your bare hands;)