I got my FP6 with Murena! (setting everything up as we speak). AMA, and let me know if there are things i could try out for you!

I'm able to install and run Triodos. I don't have an account so i can't tell if everything works in the app, but since all apps that were able to install and run also actually worked, my guess is this won't be a problem. My banking app, Rabobank, works flawless.

Since i also use Digid, i can confirm this works without issues.

I installed NPO Start, this also works like a charm.

I don't have a Chromecast, so i'm not going to be able to tell you if this works, but my best guess would be that it should.

The only troubles you can experience would be if apps and services require things like Googles Billing API, which are not present. Doing some In App Purchases and some banking/financing apps use this API, so they might not work. So check the internet to see what other Triodos users are saying about this... Maybe it's possible to spoof this, but personally i'm not willing to go to such lenghts (for my personal usage, at least). I got the Murena version to deGoogle after all...

The phone itself has been an absolute pleasure to use. Snappy perfomance, the smaller 6,3inch screen looks and holds fantastic, battery life is awesome, e/os is simple but decently customizable and fast. Bugs are very minor so far. Will talk all about this either today or tomorrow in the review i was planning to post here!