NH Iruña Park is situated in the suburbs of Pamplona, near green parks.
It have 12 floors and the view on the last floors are great. The rooms are quite nice with all amenities that NH have. Plasma TV, mini bar and 24h room service. The rooms are quiet and I think that people stay there to go to the famous Clinic of Pamplona University.
To city center you can walk: it's about 20-30 min away or you can get a taxi and it costs you ~4-5 euros and 5-10 minutes.

We stayed for two nights in June, 2007. The staff at reception are nice, but indifferent. The restaurant wait staff were indifferent to the point of neglect. The neighborhood is sterile. There is a cafeteria and McDonalds across the street, and not much else. I have paid a lot less in a lot more expensive cities in Spain for better hotels, so the value for money equation didn't work for me. The room itself is okay, but smaller than one would expect at a 4 star hotel. The bathroom was even worse. It is outdated, and has a shower with a terrible design that guarantees you are going to get wet if you turn it on. The internet service costs17 euros for 24 hours (10 euros for an hour), and there are upload, download and usage limits. That's bogus in my mind. If you are a discerning traveler, stay somewhere else.

We stayed at the NH Iruna Park Hotel in August 2006 for two nights - Fri/Sat. We paid €180 in total. The staff were friendly, the room was immaculate. We had a standard double room, which had a beautiful queen sized bed - a nice change from two single beds pushed together like lots of other hotels we came across! The hotel is situated a 10 - 15 minute walk from the old town or taxis are inexpensive, about €5. The walk into the old town is actually quite pleasant as the streets are wide and well lit and the area is nice - we felt safe walking back to the hotel late at night. The only gripe we had was with the carpark. We had to pay almost €30 to keep the car in the Iruna Park Car Cark (secure underground carpark) for two days - we felt this was excessive considering we were guests of the hotel.

I stayed at the hotel in September 2003 for about a week. The hotel staff are very friendly although I can only speak limited Spanish. My colleague was admitted at the Clinica Universitaria Navarra due to appendicitis. It was very convenience as its only a 5-10 minutes walking distance from the hotel through the beautiful Yamaguchi Park. If I have the opportunity to visit Pamplona again, I would like to stay in the hotel.