We stayed at the Argonaut in April and can highly recommend the hotel. The rooms are so lovely and we had a room at the side (I was dubious at first because it was next to the cable car station, but there was no noise at all) We could see the GG bridge from our room and luckily the weather was great so the view was amazing.
It was far enough away from the "hustle and bustle" of Fishermans Wharf, and there were some nice bars around it.
Obviously it was handy for the cable car and we travelled on it a few times, to Chinatown and Union Square. The hotel sold tickets (discounted too I think) for the cable car.
The rooms had free high speed internet access, the mini bar was full of all sorts of stuff, with additional touches like visitors map, disposable cameras, which weren't too expensive. We didn't use much but I thought it was a nice touch. Nice fluffy dressing gowns in the closet too

Parking was about £20 per night I think, but it seems it's pretty much standard in that area.
The staff at the hotel were really helpful and very polite.
The bar that was attached to the hotel does lots of different chowders and you can get a sampler with 3 different flavours which was also very nice, we had breakfast in there too and that was good.
Only downfall for me, as with a lot of SFO hotels, there was no outdoor pool.
Hope this helps
Shaz