I don't agree with them on principle but I do see the need for such places. I think the whole point of this exercise is to do with safety and not just for the users of illegal drugs. Far better that they use drugs in a controlled environment where needles can be disposed of safely rather than left in the streets, alley ways and  parks where the public and animals can be accidentally brought into contact with them.

But there are questions that need to be asked eg are these places going to be supervised to try and ensure that users don't overdose? And if supervision is provided who is going to pay to staff these units?  I think the money needed would be better spent on trying to get users off drugs rather than allowing them to continue their habits, in my view this is tantamount to the government admitting they are turning their backs on the problem.

As you say most illegal drug use is funded through criminal activity and I can't see this helping to resolve that issue.