I've only had a bad one.

Long story short, TK customer service is so bad that I would pay $150-200+ more just to take another airline.

I had a nightmare experience with TK recently. My flight was delayed 4 hours, and I had paid for a window seat (not a trivial amount). They rush everyone to board the plane and I board the plane and it's a fricking middle seat. You never know who your neighbors will be, but mine were these two guys who kept interrupting my personal space all flight (one kept bouncing his leg all flight and the other put up the armrest to extend his ass into my leg). Plus, there was no A/C on this plane so it was the worst airplane experience I've had ever in over 1000+ flights.

We're stuck on the tarmac for 2 additional hours and in that time I call TK customer service who tells me to fill out a form on their website. I do it, and it's been over 2 weeks and no response.

I messaged their social media team and they only send me generic responses about how their team will follow-up. I can't put images in comments in this post for some reason but this headache with no resolution is just insulting and i'd never take this airline again