Valhalla makes some of my most-used and recommended plugins (VVV, the incredible Ubermod), and now you're all +1ing Room and Plate sounds awesome...
When a developer pays as much attention to the details of a plugin -
loving that process as much as I love the process of writing, recording, mixing - as Sean obviously does, it shows in the work. And it's appreciated. I'm not even one to use a ton of reverb, but when I do you can pretty well guarantee it's Valhalla.