If it does work, and that's a big IF, I would be concerned about where the dealers would go?
The evidence they have so far, with the other centres, is that they "move on to other towns and cities". Surely that's just sorting out the problem in one place, and forcing it to another?
I don't know. I'm not convinced.
Put them in every single town and city that has a drug problem, and then we'll see a massive difference, but just one isn't going to help much, in the grand scheme of things.