This lock feels very sturdy and secure and comes with a handy cable for locking up quick-release wheels and 3 keys. The only thing to watch out for is the U-part is very short so you have to get your bike quite close to whatever you are locking it to - I've not been able to get the U around the frame and rear wheel in one go either!
I had one of these for about 2 months before it jammed after locking my bike up at the gym. Tried all spare keys but could not get the lock to turn more than half way, trying to force the key to turn simply bent the key and broke the plastic handle on it. Eventually with much wiggling, shaking and WD40 I did get the lock open but this was after I'd had to use bolt cutters to cut the cable portion of the lock so I could get the bike home.
For this kind of thing to happen after only 2 months of use and never being left uncovered in rain/bad weather I think is simply unacceptable. I was then refused a refund or credit to spend against a new, decent lock because I did manage to eventually get the lock open.
Save yourself the hassle, get a Kryptonite for the same price and you'll never have a problem.
If the lock jammed and you are not happy with the item and you are within the 365 day period then you can get an exchange as stipulated in our returns policy (providing the item has been used in the correct way as is the case with you). You local store should do so.
I will forward your review on to the product manager in charge of this item regarding the lock.
Peter Lazarus, National Cycling Manager, DECATHLON
This lock is not very much secure but can be used for kids bike or to just lock helmet. But at this price this is the best. Value for money
The D lock is good but a bit small in size. If you want to park conveniently and quickly, without much effort to place cycle extremely close to parking stand, then go for a larger one. Also our cable was cut, when parked outside the tube station entire day. Luckily nothing was stolen. So if planning to park for longer time at unsupervised places, then not the safest lock. We're planning to get another bigger D lock to go along with this small D lock to secure the bike frame and wheels(clip-on).