Therefore choosing the best lock for your bike is a challenge you are not allowed to give up. Some say to invest even 1/3 of the value of your bike in your lock, that won't be the case if your bicycle is worth more than a thousand dollars, there are no such expansive locks (to the best of my knowledge). Anyway, buying a top notch lock will seriously relieve you worries.
When it comes to bicycle touring some are so brave to tour without a lock, I honestly won't advice so. It's true that a bulky bike is harder to steal, but if someone menages the theft... well, most likely your tour is over.
The lock have been with us on a two years long journey, 25,000km across 23 counties so, even though apparently the lock weren't never attacked, you can consider this review a real product testing on-the-road.