This place is a true gem. If you want to feel truly welcome and well provided for, this is the right place. Bill and Tracy are great hosts and seems to enjoy spending time with their guests whether it's pouring them a beer, just chatting or going out of their way to fulfill a personal request. Tracy is also a masseuse and although I didn't have time to take advantage of that feature, I certainly plan to on our next visit. Impossible to say enough about the breakfast served! Never the same breakfast twice and all were delicious. Although Tracy is the professional chef and it definitely shows, Bill also cooks splendid breakfasts. It was very enjoyable talking with the Bill, Tracy and the other guests over a very satisfying breakfast before starting ones day exploring Mazatlan. Olas Altas is located just steps from the Malecon and a few short blocks from the Plaza Machado. Both the Malecon and the Plaza Machado have good restaurants with the atmosphere at the Plaza Machado being more "old world". Bill completely restored the Olas Altas building and he did a wonderful job of it. From the beautiful sweeping staircase to the hand made chairs, etc. in the kitchen, to the use of complimentary colors on the floors and walls. A beautiful job and a pleasure to experience. Our only slightly negative comment is the street noise on some nights. My husband and I somewhat noise sensitive and did need to use ear plugs to get a good night's sleep on some nights. Hence the rating of 4 for "sleep quality". The mattress was great, the room was large and clean and staying in the "Fish Room" we had double sinks in the bath which we really appreciate. We used our ear plugs and had no problem after that. One last note; don't be afraid of staying on the upper floor because you don't think you want to deal with the stairs. My husband and I have both had knee operations and are no fan of stairs but; Bill has made the raisers on the staircase the perfect height so their is no strain on your knees! What a relief that was! Obviously, we were very happy with our stay and will definitely be returning and highly recommend Olas Altas for your vacation.