We stayed in the Hotel Shattuck Plaza for a week in September, and were very glad we chose this hotel (mostly because of the good reviews on Tripadvisor). The room was clean and had all the amenities we could ask for, including coffee machine, free wi-fi and a free bottle of water every day (a very nice touch!). Anything we asked for was delivered very promptly (iron & ironing board, extra blanket) and with a smile. The bed was very comfortable and the bathroom has the kind of light that goes on automatically when you enter the room, which is also a nice feature to have at night! The only problem was some noise from the street (no fault of the hotel), but it didn't bother us that much.
We ate breakfast in the hotel restaurant twice and enjoyed it both times: good food and excellent service. There are also many many good restaurants in the center of Berkeley within walking distance of the hotel, and we were also able to walk to the "Gourmet Ghetto" in North Berkeley (about 20-30 minutes walking).
Also within walking distance of the hotel is the Berkeley Repertory Theater, where we saw an interesting play, and of course the U. of Cal campus which is 2 blocks away.
All in all we would recommend this hotel to anyone looking for a good place to stay in Berkeley.