Been with ING for almost 20 years. My only issues with them are:

• They're slow to adopt new tech. Tap payments, Google Wallet/ApplePay integration, etc. takes a bit longer than the major banks.
• They screwed me over once on what should have been a routine (and totally affordable) mortgage extension to finance some renovations. I'm still a bit salty about it, but it was mid-covid and I suspect their competitors would have been just as cagey and risk-averse at the time.

For day-to-day regular transaction account stuff they've been super chill, and their front-line customer service is surprisingly decent.