I haven’t had an opportunity to try the app yet. As it turns out, it’s a bit difficult to request a password reset on a Steam account. I haven’t logged in to Steam in probably a decade and, naturally, can’t remember my password — I created the account back in my pre-1Password days.
So I’m waiting on a response from Steam’s support team to see if they’ll grant me access again. Until then, I’ll be anxiously waiting with my MFi controller at the ready.