I stayed at the Fairfield Inn & Suites by Marriott in Hooksett for a seven days while I visited a friend from college. The staff were friendly, the room was clean and undamaged, the bed was sooooo comfy, the tv was of excellent quality, and my stay was very quiet. The breakfast they serve was tasty, contained a decent spread of options, and was open later than most hotels I've been to. The hotel also has a 24 hour snack bar, where you can buy some great late night treats. The area is safe and the hotel felt secure.
My only issues were small in comparison. The biggest problem being the pillows. Each bed had four pillows, that were both hard as a rock and lumpy. The bed itself was very comfortable though, so I still had a great night's sleep. I would just recommend bringing your own pillow.
Other than that: The gym was lacking, only containing basically a treadmill and some weights, but the pool was nice. And there is very little in walking distance and there is limited transportation, so make sure you bring your own car.
Would still recommend this place. Especially if you are there to visit SNHU. As the school is just down the road.