"How to judge a bathroom" is the title of this page at Mary Ann Racin's Bathroom Diaries. You won't find ADA/DDA regulations or auditors checklists. Instead she sets cleanliness as the highest criteria and:
Other considerations for good restrooms are: safety, handicap access, changing tables (anyone who changed his/her baby on an airport floor will agree) and hours of operation. Unisex bathrooms are helpful both to parents with young children as well as to our pre-and post-op trans-gendered brothers and sisters
Her site sets out to answer the age old question, "So we know what we want, but how do we find it?"
Read Elizabeth Tai's review in theStarOnline.