The Anna Pension is a great place to stay in Santorini. It's close (few minutes' walk) to good restaurants, a quad/buggy rental business, bus stop and a 10-15 minute walk to Fira, which has lots of restaurants, bars and a major bus hub from which you can catch a bus to anywhere on the island.
The pension itself is clean and very pleasant, with friendly staff. You can also get breakfast, water and other drinks for a good price there of you don't feel like walking out. Great experience!