This is a prime example of how the owners and/or staff can make a place exceptional. I don't have a lot to say about the guesthouse itself - it's an attractive old teak house with clean functional rooms that presents very well for the 600 baht (en-suite double) asking price, but the owners were amongst the most delightful people we've encountered on 8 trips through Thailand.
Sadly we didn't get to try their food. Their restaurant was closed for NYE, apart from a private booking that they were honouring from a long time earlier. Not a problem, we had dinner at a so-so Burmese place up the street. When we returned to drink our bottle of champagne that we'd carted from Chiang Mai especially for the occasion, and the lady owner had happily refrigerated for us, they were unnecessarily awkward about the dining family (it was absolutely no problem to us), so much so that they insisted on specially making an enormous plate of complimentary spring rolls for us. Rather than prove the exception, I strongly suspect that this is simply how they operate. Wonderful.