I'll never be this hip
During a recent trip to San Fran we stayed for two nights at the W. 
1. Ambiance - this hotel and most W properties exude this impossibly hip vibe. Beautiful people, club music, funky furnishings. It doesn't negatively impact your experience but it doesn't make you want to buy a black turtleneck either.
2. Staff - Awesome. Nice efficient. Helpful. TV in room not working? One call to front desk results in pleasant service guy at my door within 10 minutes who fixes problem. Ahhh...
3. Location - great location for exploring the city. Very central. No need for car.
4. Room - clean, small but efficiently designed. Am I the only person who hates the clock with the IPod docking station that WON'T CHARGE AN IPHONE? I suspect not. Let's do away with them and just dangle charging cords. Toiletries keep getting smaller and there was enough shampoo to wash 1/3 of your scalp but these are minor complaints. Room was comfortable and quiet.
5. Other- the Acura MDX drop off service is the best. Sign up at the desk adjacent to the front desk and you'll get a free ride where ever you want to go. Only, unfortunately, they won't pick you up so plan ahead.