These are my preferred locks for my motorbikes. Small and easy to use. Today I had to get one off one of my bikes and I couldn't find the key. No problem, I bought a "master key" on sale that worked fine. Went through it like it was butter. I thought that maybe I would have to use the Dremel to get through the case hard, but no the master key worked just fine.
Got it on sale too a while back.
Kinda disturbing to know that even with half inch locks a twenty dollar tool can open it in 10 seconds eh? Yup, locks are to keep honest people honest.
With a pickup truck, a buddy and a 30 inch bolt cutter you could steal 20 bikes a day.
If you have to lock your bike in sight lock it where lots of people can see it. Your lock ain't even going to put a nick in a big bolt cutter.