I use a Bordo 6100 on my titanium bike. It is not my most expensive bike, but it looks like my most expensive bike. Not as good as a U lock, but I did not want a U lock due to the large shape of it. I think it is similar to a U lock for unfolded size and ability to lock a bike to a sign post or bike rack. But for high theft areas I instead ride my errand bike, a 30 year old bike I bought at a garage sale for $5, although that bike needed $50 in parts to make it ridable a decade ago.

The Bordo bracket is strapped to a tube on the bike. I had a slight rattle that bothered me, also using a velcro strap around the lock and tube cures that. I got the longer length of lock. This lock and bracket is quite convenient to use. I want a combination lock so I do not worry about forgetting or losing a key. The Bordo hangs below my top tube in the photo.



On a bike tour, I often bring a second lock. A short heavy cable, note the padlock is one of those weird ones that I think theoretically are hard to use a bolt cutter, below. Of the three options I am showing here, this is the least convenient. I bought the combination padlock separate from the cable. I think this cable is only 3 feet. But using both that cable lock and the Bordo makes me pretty confident that my bike is reasonably safe.



But if I am only going to be in a convenience store for 5 minutes or if I was sitting in a restaurant where I can see my bike out the window, I want the ultimate in convenience, then I use a skier type lock that is no more than an inconvenience for an opportunist type of thief, as below. Even a small cable cutter could cut that. But I am hoping nobody has a cable cutter in their pocket when I lock up the bike with that lock. I would never use this in high theft areas.