Stayed here for a week long couples retreat. Location was amazing, across the street from a great chocolate and gelato shop, lots of great cafes nearby, walking distance to supermarkets and pretty short drive to nearby Byron and Brunswick. Mullumbimby itself has a small town charm that isn't crammed with tourists yet has some very high quality eateries and some quirky shops to check out.
Place was as advertised, clean, modern and stylish and had a good kitchen set up (though I second the other reviewer who suggested a microwave would be a welcome addition!).
While the unit has air con and a ceiling fan, the design of the place means the hotter air tends to drift up to the bedroom, but it's not really noticeable on all but the hottest days.
Our trip was a bit rushed and frantic from our end so we didn't have much opportunity to communicate with Elyse, but she was welcoming and gave plenty of info and tips, check in was painless. Would definitely stay here again.