My girlfriend and I stayed at Hotel Ampere for 3 nights during December 2011. The staff were very friendly and the hotel was modern, clean and inviting.
Our room was a good size for a city hotel and overlooked the beer garden to the rear. We did not experience any noise from adjoining rooms, and the well lined curtains and automatic shutter kept the light out to ensure optimum sleep time.
The location of the hotel is great. A 4 minute walk takes you to the Pereire metro (Line 3) and Pereire-Levallois (Line C) RER stations. The area around the hotel is quiet, but not dead. There are shops, restaurants and bars all nearby - a great place to relax after a good long walk around the city during the day. If you want a more lively area, you may wish to look at hotels in the Latin Quarter of the city.
It takes approximately 20 minutes to walk to Avenue des Champs-Élysées, but if you want to save your legs, you can hop on the metro and be there after a few changes (if it's wet, the metro is a life saver). If you want to brave the rain like we did on our first night, the Hotel is happy to provide you with a decent umbrella to keep you dry.
If you are after a 4* hotel with exceptional value and a good base to explore Paris, Hotel Ampere is a great choice. Go for it.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC