No issues here! Or deal-breakers. I use my MPB at school so if something is off, people will notice.
The keyboard is great ... yes it is a little bit loud but no one has said "who is typing like that?". One issue is FANS. People have said, "What is that sound?" or "What is that?", including teachers when the fans go off. I have no idea how to fix it ... SCM ... PRAM ... Safe Boot ... First Aid ... Recovery Mode ... ending processes .... nothing fixes it. The fans are mainly an issue during logging in though ... nothing else however.
The Touch Bar is very useful! Yes, better app support will be nice. However, it is very useful .... it is not a gimmick .... it is something that has improved my productivity and it is now something that I can't live without. Very worth the money! Very happy I got. It is just the fan issue during login I hope gets improved because I tried everything but the issue is just during login so it isn't enough for me to take it to Apple.