JW Marriott San Francisco Union SquarevsFour Seasons Hotel San Francisco
Both properties are endorsed by those who travel for a living. On balance, Four Seasons Hotel San Francisco is preferred by most reviewers compared to JW Marriott San Francisco Union Square. Four Seasons Hotel San Francisco comes in at 90 with accolades from 18 reviews including Jetsetter, BlackBook and Concierge.
JW Marriott San Francisco Union Square
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500 Post Street, San Francisco, CA 94102 
From $143/night
- Pet Friendly
 - Bar/Lounge
 - Free Internet
 - Room Service
 - Laundry Service
 - Concierge
 
 "Its rooms are a tech-lover’s dream – each is equipped with a 42-inch LCD TV with a plug-in panel, Bose sound system, ergonomic office chair, and wireless internet." 
 "The hotel features a state-of-the-art fitness room and technologically savvy meeting rooms." Full review
 "The public areas are glamorous, and the bedrooms refined and elegant. Business travelers will find the staff extremely helpful." 
 "Rebranded in 2006, the former Pan Pacific hotel is far enough from Union Square that guests can avoid the crush, but close enough that the shops are mere steps away." Full review
 "At the corner of Mason Street, one block west of Union Square, and six blocks shy of the Bank America Center and the Financial District, this...is in an excellent location for business and pleasure." Full review
 "Despite its size (21 stories and 329 rooms in all), the JW Marriott San Francisco has a decidedly intimate atmosphere amid the bustle of Union Square." 
4.5
 ""Far above par", this Downtown "luxury" chain outpost "delights", from the bright "soaring" lobby to the "comfortable" quarters." 
 Recommended
 "JW Marriott San Francisco Union Square is a colorful and urbane hotel just steps from San Francisco’s bustling Union Square, the Financial District and the Embarcadero." Full review
 "A casual, tranquil vibe above the hubbub of downtown (an impressive feat in a 337-room hotel), and a staff quick to anticipate your every need." Full review
 "The hotel tends to attract a strong following of business travelers, but the great bathrooms and amenities, as well as proximity to Union Square, would appeal to travelers of all stripes." Full review
Four Seasons Hotel San Francisco
 Rough Guide
 Michelin Guide
 Concierge
 Fodor's
 Lonely Planet
 Oyster
 Travel + Leisure
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 BlackBook Show All Reviews 
757 Market Street, San Francisco, CA
From $374/night
- Pet Friendly
 - Bar/Lounge
 - Free Internet
 - Room Service
 - Laundry Service
 - Concierge
 
 "The place to stay if you win the lottery (or someone else is paying), this ultra-luxe hotel on Market St affords spectacular views across the city. Its plush rooms are the ultimate indulgence." 
 "Nobody does modern luxury quite like this straight-away winner." 
 "The superluxurious Four Seasons San Francisco is a sanctuary so serene it's hard to believe it's in the heart of downtown." 
 i 
Though the understated greige decor successfully straddles the line between contemporary and traditional, with clean lines and zero clutter, it lacks color and splash: If you like fringe and chintz, choose the Ritz-Carlton instead.
 "This exclusive, award-winning hotel is sandwiched between multimillion-dollar condos, elite shops, and a premier sports-and-fitness complex." Full review
 "The Four Seasons is huge, confident and very corporate, and one of San Francisco's best posh hotels." Full review
 Kid-Friendly
 "The Four Seasons' huge, well-outfitted rooms and attentive service are among the city's best, but the 277-room property falls a bit short of expectations." Full review
 "A head-to-toe renovation in 2009 perked up this plush high-rise; rooms have floor-to-ceiling windows, black granite credenzas, and Eames chairs. ." Full review
 "Situated between Third and Fourth streets, adjacent to the Jewish Museum, in a dynamic neighborhood racing with activity, adjacent to the Financial District, Union Square shopping." Full review
 "This luxury hotel facing Market Street in the Financial District towers over the city. Superior facilities immerse guests in contemporary elegance and refined details." 
 "Tastefully modern halls of muted beige and blue tones, exotic African woods. Hushed, intimate feel of fifth-floor lobby offers womblike retreat from the clatter of Market Street."