This lock maybe be more expensive than a comparable U-Lock but its portability, flexibility, and tough design make it a good solid choice. I bought the Abus Bordo because it was more flexible for fitting around a larger mountain bike tire and seat tube. The metal bars and locking block have a thick rubber rubber coating to keep your bike protected. Overall this is a well designed strong lock.
This looks feels much more secure than a cable lock, is significantly more compact to carry than either a cable lock or U-Lock, yet offers most of the benefits of both. If you're looking for a solid lock that isn't easy to break or cut through, and still has some flexibility for wrapping around bike components or thick posts, this is your ticket.
This is the long version and it still can come up short sometimes. Any longer would be way too heavy. Add a cable for the front wheel and a smaller one for the seat & post and pass the lock bars through it. I just does not get any more secure. Ideal for a e-bike where total weight is not such an issue.
Similar weight to a full sized U, but has a nice carry case and it folds up small, so easier to stow on the bike than a U-lock or big, heavy chain. It fits around slightly larger objects than my old U, but can take some getting used to.
What I like most is that the flexibility makes it easier to share a rack locking point that already has a bike on it than with a U, and I often need to do that at work.