From our 1970s experiment:
https://www.marketplace.org/2016/12/20/dauphin/
The problem I can see is some businesses need low wages. UBI of $500/week is basically $12.5/hr. And the way that experiment went, sounds like for every $2 you earn, $1 comes off UBI, so anyone working full time of $25/hr will be off this gravy train. So there is still some incentive to work, although a lot less. I also think we need to get rid of cash and digitize it so people can't work under the table for this to be flawless.
Consider how connected we are today compare to 50 years ago, I'm not sure an isolated experiment will yield any unbiased results. Especially money today get you access to a lot more choices of drugs and indulgences then ever before.
Now if they can dump EI/OAS/GIS and replaced by UBI, admin cost alone will reduce greatly when you don't have to audit a bunch of thing to give you $. Just check on your income history. If there are side effect that actually lower hospitalization and other social program costs, bonus but harder to justify.