When I was there also in Febuary of 2002 there were two Hampton Inns. They are so close together that they may appear to be one. The one closest to the main highway by the airport is older and the Hampton Inn behind it opened in January of this year.
Neither hotel is anything special, typical U.S. Hampton Inn standards. Clean rooms but they put special emphasis on enviromental concerns. I have stayed in both as Hilton Diamond and not been given any sort of upgrade, even though Suites were available at newer hotel.
Costa Rica on the other hand is a great place to visit and you will find much nicer accomodations for far less money the further you get away from San Jose. If you are participating in Hilton 50,000 mile promotion a stay on arrival and another stay the night before departure might be in order. I think I only paid about $75.00 per night with AAA discount.