It's good. I've had good teleport locations. My only complaint is that I wish it showed the countdown 5, 4, 3, 2, 1, 0 in the chat so that I am not guessing. Just a small thing really. That or like a bossbar at the top that depletes until the teleport goes off.
The chunk lags when you finish teleporting. In the nether you often spawn inside blocks and die or it will lag the server then spawn you at the same y level each time.