I stayed at the Fairfield Inn while on a business trip to Fresno - the business I was visiting arranged the accommodation.
Overall, I feel that the Fairfield Inn is a pretty solid, mid-priced hotel, and this member of the chain was really no different. The front desk staff was very courteous during all interactions and did what they could to make my stay as pleasant as possible.
The room was a basic hotel room; more importantly, it was both clean and quiet. The internet was high speed and free, and there was a free continental breakfast in the mornings that had a good selection of meal choices. My one (small) complaint is that it would be nice if there was shuttle service to the airport, but it's a small complaint and would not keep me from staying here again if I were in the area.
Overall, it's a basic, mid-priced hotel. It's neither pretentious nor sub-standard, and represents good value for the price.