It's great to hear so many users are reporting back with long term positive experiences.

OttoLock is much lighter than any U lock by a wide margin. Ottolock is half a pound. The lightest mini u lock is 2 lbs. The heaviest weigh in at 6 lbs.+. My kryptonite + cable + keys is 3.5 lbs.

I wouldn't mind dropping 3 lbs of weight if the lock is just as secure and the price hit isn't too great.

It turns out I spoke too soon. According to a reviewer on mec.ca, the ottolock can be cut through, in very little time.

I won't be "upgrading" to an ottolock. Perhaps my generic kryptonite ulock isn't any more effective, but at least it won't cost me an extra $100 if it's defeated.