I’m guessing a lot of Americans aren’t used to “small” cities that we have in Europe, due to how big the US is in general. I went to Brussels in November and found it pretty easy to get around. Beware though, if you fly to Charleroi Airport, they don’t have Ubers. I ended up getting a taxi driven by an Albanian who charged me a lot more than an Uber did to get back to the airport. Flying into the main Brussels airport would be recommended.