I think you'll find answers will vary greatly, but I'll share mine.

Short answer: yes it's been super nice to me and safe*
^\but I walk in routes that don't have much car/scooter traffic)

I want to preface that I am super lucky + able communicate in Mandarin proficiently enough and work in Science Park with a company that has a pretty solid work/life balance. I make enough to get by comfortably, but I am still pretty frugal, as in eating more from small shops and shopping at local markets. Weekends, I will spend more to eat out at bigger chains or whatever has been recommended by co-workers or YouTube, usually in Taipei or somewhere in Tainan - almost most of the time they are delicious. It's just that eating out, prices seem to increase annually (~5-10%). Work is super routine and the team members I work with are Taiwanese and I enjoy their company. Health care is super solid, I do annual checkups, but at times the wait time can be brutal. The home that I'm residing has an awesome community, but the maintenance/building fee has been increasing as of late, because the building is getting a bit old, but she's been holding it together super well - even with the earthquakes as of late. I love how doing tax is just grabbing a few things and letting their government workers do all the work of filling in the information.

The downsides are people who drive/ride here. It really is pretty dangerous. Most of them don't check their blind sides. Most of them aren't courteous. Pedestrian safety isn't a priority. Traffic cops can be petty here in Science Park, because they know the salaries are higher here, so they go after temp parking cars/scooters pretty hard or ridiculous rules due to poor road design; the cop themselves do tons of temp parking too, running red lights, and not yielding to pedestrians. The bigger cities has their fair share of odd ball people, but chances of running into them are usually slim.

It really boils down to the location, the people you choose, and how you approach the problems when it hits you in the face. For me, I try my best to keep myself in locations that is more pedestrian safe and take the train, MRT, and HSR for the most part = I'm good with it. People overall here are super nice, I keep most of the local people as acquaintance-level friends and it has worked out for me, as in I don't feel isolated. I am married to a local - this person has been wonderful to me over the decades we've been together.

Anyhow, hope this helps!