As I needed a new set of security locks, I bought these Warwick as they where cheaper than the Schaller, but as far as I can tell are compatible. The old ones had a few bad reviews as they used a different locking system, that sometimes wouldn't close, the new ones are exactly like the Schaller locks and so I'm confident enough to trust them.
The installation works exactly like the ones from Schaller, with the same, usual problem that it can get a bit tricky with a thick strap. But besides that, everything works fine and I don't see any negative point to use them.
The only problem I had, where that the existing hole in my Bass was to big, so I needed some other screws, or close the hole up before using them. But that is not the fault of the strap lock manufacturer.
If you need some new Security Locks or if you buy your first one, I don't see any reason to buy other ones if you just start to use a System and need to decide which one you want to use.
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