Originally Posted by
Slaninar
Cheaper U-locks have a lock that can easily be picked. If you want a system with good thick hardened steel, good lock and good holding mechanism that prevents brute force breaking, you need to pay more. Unfortunately.
The OPs current U-lock has the same laser cut keys as a Kryptonite, and secures at both ends. That makes it fairly resistant to both picking and leverage.
The OPs existing lock seems like a good solution for an in-expensive commuter bike. It will deter most thieves, and the bike is cheap enough that determined thieves won't waste their time. I can't see justifying buying a lock that costs as much as the bike.