I love nak! I started to use it after your blog post a couple weeks ago to sync relay profile data. I have never used the bunker with it though. I exclusively use Amber and don't have any issues with that. I run my own nsecBunker, well I used to before I had problems with it and generally liked it up until I had an issue. nsec.app is a bit confusing because of the pop-ups, but I've had medium success with it. All in all, we need better UX for these things.