Overall, I would say it was well-used considering the problem our country has with "free money" initiatives, although I definitely met some people who tried to "cheat the system" to some (smaller) extent, e.g. by using the voucher to get free high-end Kindles in bookstores.
Also, about 40% of purchases (if I recall the stats correctly) were made on Amazon, Spotify or other "big tech" corporations, meaning that while it gave a boost to the smaller economy, local businesses did not get from it as much as one could expect.