So far, I have not enjoyed my experience here (I moved to Brussels on Dec 1, 2016). This is the 7th country where I've lived and worked, following the US, Canada, New Zealand, South Africa, the UK, and Japan, and in practical terms, it's at the bottom of my list.
Why? First of all, nothing's open after work. I can barely even buy groceries. I've yet to make it to a mall, all of which close at 7 and aren't open on Sundays.
The immigration process is an absolute nightmare - endless paperwork, fees, and visits to various offices. I get conflicting information on every visit. No one seems interested in doing their job properly. I've been here for 4 months, with no end in sight. One chap said his paperwork took over 9 months to complete. In every other foreign country, the process was done within 2-3 weeks and a single application, and I never had to think about it again. Here, I'm running in circles. It's disruptive to my job and it's a generally miserable experience.
The taxes are among the most extreme in the world - I'm losing almost 50% of my paycheck to various withholdings, yet the public services are mediocre at best. If the government were a car, by price it'd be a Ferrari, yet by quality it'd be a Dodge. Speaking of cars, a lot of companies offer company vehicles as a perk to get around the taxes, since it's almost impossible to make a decent living by pay alone. But the traffic and parking situation is less than ideal, as a result.
The doctors are a nuisance - cash in full up front, regardless of the cost of the service (imagine you need an MRI - need I say more?), and no reimbursement until you have a social security number, which as I said takes ages. And even once you have your docs, it requires a bunch of paperwork to get reimbursed, much like everything here. In the UK, healthcare was free - free of cost, and free of hassle. In the US, I paid a bit more but at least I knew my terms and what I'd get back and when.
The pharmaceuticals are also a headache - the industry is heavily regulated here, so I can't even buy ibuprofen at the grocery store. And the pharmacies have extremely limited hours - often 10-4 or 10-5, M-F - again, virtually unusable. I restock my pills whenever I go abroad on the weekend. It sucks to be forced to do this. In Japan, pharmaceuticals are also available only in pharmacies, but some are open until 10 pm, so it was never a concern.
The banks also have extremely limited hours, and many are closed during the lunch hour as well, which is the only time I can manage to get free from the office. Not everything can be done online. I can work around it, but it's a nuisance.
As far as my physical well-being goes, well... definitely worse than ever before. I have a chronic knee problem, so I'm somewhat restricted in terms of the types of exercise I can do. I like to swim, but all the swimming pools are closed by the time I leave the office, except for a couple days a week. It's very restrictive. And the weather isn't great, so outdoor activities are limited by the rain and wind.
As for mental health... not great. I feel like I'm living in a straightjacket. Feels like there's nothing to do after hours except drink or go home. I feel like I'm living in a city under martial law, with a curfew in place. It's ridiculous. Outside the core city centre, there's nothing happening - the bars and restaurants are empty. Doesn't seem like a healthy economy, and above all, it's a drag. Boring is the word.
For a European capital, it's extremely disappointing... and things are even worse elsewhere in Belgium. I don't think I'll be here long, and I wouldn't recommend it to anyone.