As I mentioned above, I bought five locks (and yes, that's ten keys) in order to play Givi mix-n-match with my motley assortment of bags.
I've had two issues: some of my bags are fairly old, so after some experimentation, it turned out that the new lock cylinders had to be installed in such a way that they turned backward from the original. That was odd for a while.
The second issue is that the keys I received (the coding is just the luck of the draw) have a very deep cut in the middle of the key, and I've broken two in about three years of use. Plenty of spares, of course, but the tip of one key broke off in the lock, and that was quite inconvenient.
There are various cheapie Chinese knockoffs out there, but there's really nothing like the strength and quality of Givi's luggage. The stuff really holds up.
2002 Suzuki DL1000 V-Strom, Dark Metallic Space Blue
1983 Suzuki GS850G, Cosmic Blue
2005 KLR685, Aztec Red - Turd II.2, the ReReTurdening