Delicious. I especially enjoyed Harry’s almost trancelike state of mind which made it possible for him to relax and trust the Room to know what he needed. And it was both sweet and amusing to see Severus’ growing appreciation for the Room and the "incredibly realistic" fantasy it provided. Very hot too!
If Snape made him feel that good, then Harry would do what he had to do to keep that feeling. He would figure out a way to keep Snape. He reckoned it was the least he deserved after everything he'd done.
I liked Harry’s practical thinking and the following trickery.