Just received this Bully Lock this morning. I really can't recommend this lock. It seems to be fairly strong, but as the video shows, a few whacks will break it open, but what is not said is when the alarm and pager system within was damaged enough to quit.
Not big enough to go around my rear wheel (Honda VFR with standard rear tire).
Much more importantly: The whole idea of an alarm is the fact that often, locking your bike to an immovable object is out of the question and I would often be relying on the alarm to alert me to theft. (The whole idea of having an alarm + pager) Theft as in four big guys lift my VFR into a waiting van, and drive off. OOPS! - the alarm is sooo insensitive that after it is armed, I can pick it up, turn it up side down and all about, even shake it hard enough to move the shackle, rattling back and forth , and walk about the neighborhood w it, (red light happily blinking) without it going off, or paging. Only when the lock is *violently* shaken, or sharply hit does the alarm begin to beep, and then in a moment go off, together with the paging. Quite disappointing.