There is several weaknesses in this lock. I see at least 3 different approach that would easily defeat it. I don't want to go into detail to give all the ways of how to open this lock to thieves.
What i would say is that compared to a hidden gps this one is way more visible with its solar panels so that a thief can notice the lock 100 feet away (not good).
Another thing i would say is that if you have to make room for electronic components instead of alloy it is certainly not as resistant as another simpler ulock though this one has an accelerometer (which can be defeated using several approaches). To make things even easier they've also added a microUSB port above everything else. Come on!
The more ways you give to the owner to open his/her lock the more ways you give to thieves as well. There is redundancy of means to open the lock which is not good and just a few to protect it.