I can't believe all the bad reviews that are posted on trip advisor for this hotel. My wife and I have stayed here several times and are going again in a few days.
All the different rooms we have stayed in have been comfortable and clean. The decorations of the rooms are all individual and more like you would find in somebodies home, not like you find in a corporate chain hotel.
The location of the hotel could not be much better. You are within easy walking distance of any place in the town of Mendocino with lots of places to eat or shop. The ocean is right across the street and Mendocino Headlands state park is a few blocks away.
Our favorite room/suite is one of the old water towers with a deck on the roof. You have a 360 degree view of the ocean and Mendocino from up there.
Yes, the main hot tub is clothing optional, if that bothers you there is an optional privat tub you can rent. The tubs are made from redwood and are clean and clorinated.
The rates are very reasonable for Mendocino. You will have no problem spending 3 or 4 times the price for some of the other places in or around town.

After considering several options for my stay, I settled on The Sweetwater Inn and Spa.
$125.00 for a large room, king size bed, and a generous view of Mendocino Main Street,
a historic church and the pacific ocean.
Clear skies or foggy, the ambiance was magical and so relaxing and comfortable.
Very friendly check-in process, three hours earlier than posted, walking distance to fine dining. and easy parking in front.
There is no breakfast as part of your stay. Not that big of a deal.
The spa is free for guests and no additional charge, clothing optional group hot tub as well as private tubs. A bonus attraction for those that like to soak.
Was well worth the time spent there.

We stayed in the sweetwater tower, and would recommend only this room, as the perks of this room make my review positive. The room itself, although clean, was old and ugly. It looked like an estate sale vomited in there. The bed was the most comfortable thing ive ever laid on though, and the remote control fireplace was perfect. At night, we had the jacuzzi, sauna, and outdoor shower to ourselves. beautiful gardens, stars above, and perfect weather made this a night we will never forget. Romantic, sexy, secluded, and quiet. I wouldolnt recommend a lengthy stay though, as the bathroom is shared during the day. Staff was incredible, rate was reasonable, and this inn is unique and must be tried at least once if youre a couple!

We stayed at one of the Sweetwater houses not far from the spa. The upstairs has been turned into two units for guests. We stayed in the unit that had the deck with ocean view. It was a lovely place. Loved the fireplace, the soundsystem throughout the entire unit...bedroom, bathroom livingroom. Very short walk to grocery store and Mendocino Village. Because we stayed during the week and not weekend, it was $100 off and the price was extremely reasonable for staying right in town in Mendocino. I don't really like B&B's, so we usually get a cabin or house, and we'd definitely stay here again. It was nice not having to drive after dinner and a night out so you could enjoy a beverage or two (or three!).