We stayed at the Dunn Inn for 2 nights for our last vacation to Costa Rica (the first and the last night due to the international flight schedule). It's a good option if you don't want to spend a lot of money in a not so interesting city. The rooms are clean and you are close to a couple of nice restaurants of the area.

We found this to be a very good hotel.
It is very clean, the rooms are of medium size, the bar and retaurent have a good ambience, and the staff were very helpful.
The price is very good value, at $57 a night. Breakfast was included and was sumptuous. Egss any style, bacon, sausaga, fruit, yogurt, cereal, milk, toast marmalade.

We found it hard to find, we find anywhere in San Jose hard to find.
The hotel map on the internet, had South at the top, which as a sailor I find difficult

We stayed at the Dunn Inn for 2 nights - one at the beginning of our trip in CR & one at the end. The reception was friendly, but somewhat incompetent (ex: didn't realize he could contact Interbus when we asked him to look into options for getting to Monteverde).
The rooms are small, clean & simple. Beware that they can be very loud at night (there is a casino & restuarant with nightly live music across the street, which can be annoying - especially when you have to wake up extremely early the next morning to catch a flight.)

Don't expect the Ritz. Expect a simple clean room with TV, Mini Bar and very polite staff. No AC in our room but a nice ceiling fan. I'f your looking to save some money and feel safe and comfortable the Dunn Inn is the place to stay.