I really recommend the Herbert Hotel in San Francisco. It's located on Powell Street, the main street in San Francisco, two blocks from Union Square, on the street of the streetcar. I had a problem in my bathroom and the solved very fast. The rooms are very good and the price very reasonable. It' my second time in San Francisco and also my second time on the Herbert Hotel.

Alexandre Ruggieri Kosbiau, Italy

I'm not sure if we were just unlucky with our room or if the website developers are using false photos or a serious amount of photoshop but our room was tiny, very bare and pretty noisy!
It's a strange set up, almost hostel like, but I have to say it was really clean and served its purpose for our 5 day stay!
By nature, downtown San Fran is a busy, bustling city so be warned, they start their mornings pretty early with the cable cars etc, they will wake you at 6am!
Also, the walls are paper thin in the hotel, the girl next to us had a cold and I could hear her coughing and sneezing alot which was annoying!
Another positive is that there is a PHENONEMAL breakfast diner about two doors up YUM!!

After spending three miserable nights in the Union Square Plaza Hotel, I phoned the Hebert in desperate hope of a brighter, quieter, more comfortable room. The brochure showed clean, brightly decorated, pleasant rooms, and the one we were assigned did not disappoint. The seventh floor location had surprisingly little noise, since the windows were good and we were high above the street. Although the bathroom was tiny, the room itself had enough space for a chair and mini-fridge (hooray!), which was a nice bonus. The second floor also has microwaves, a coffee maker, and coin-operated laundry. You really can't beat the location or the price, and while you shouldn't expect luxury, this hotel supplies the basics pleasantly. The locking lobby door is a plus, since quite a few people live on the streets in Union Square, and the green cleaning products and fluorescent bulbs will make the environmentally sensitive traveler happy.

We stayed in this hotel for a weeklong vacation, and we were quite satisfied with it.
Our room was on the 6th floor, a nicely decorated (we loved the brick backwall), spacious-enough bedroom with a clean bathroom.
The real surprise was the decent and quiet heater which was really useful during those cold November nights.
Since our window opened to Powell Street it is no surprise that there was some noise from the cable-car bells and the traffic, but it wasn't so bad at this 6th floor level.
Some negative remarks must be done as well, eg. the room could be taken only at 3 pm, while check-out time is at 11 am - if we wanted to stay until 12 pm, it would have cost an extra 20USD...
Considering the price and the location, this is a very nice value as a budget/mid-range hotel.