This Abus u-lock is a great lock for high-risk circumstances. If you have an expensive bike and you need to leave it in crowded urban areas for extended periods of time, then this lock could be the best option for you.
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Pros
Pro A great u-lock for high-risk circumstances
This Albus u-lock is a great option if you have an expensive bike, and if you need to leave it in more dangerous areas of the city. The 'u' part o the lock is a parabolic shape instead of round, which makes cutting it with bolt cutters, car jack or saws too time-consuming to be possible. Every part of this lock is made from temper hardened steel. Any thieves would need power tools to break this lock.
Pro Plastic coated to avoid scratches.
Pro Relatively lightweight
This lock weighs around 4 lbs, which is not the heaviest nor the lightest lock. Considering the security level, it's definitely one of the more lightweight options when compared to locks with a similar security rating.
Cons
Con More difficult to transport than chain locks
U-locks don't generally transport well outside of backpacks or specialized u-lock holders that mount to the frame of your bike. It's a choice between having less space and more weight in your backpack or cluttering up your bike frame with an extra accesory.
Con Difficult to wrap around some objects
As with any u-lock, the shape does not bend and it could be difficult to find a place to lock your bike to.