I had a fantastic three-week stay at Philippe's apartment! The apartment itself is roomy, includes lots of nice amenities (several English language news channels, new appliances, washer, iron and ironing board, closet space), and has a really comfortable and large bed.
As for the location, it's hard to beat. You're a short walk from the entirety of the old city, Parc des Bastions, many major bus and train lines, the lake, and the shopping district.
Plus, Philippe was a very accommodating and responsive host.
I would absolutely stay here again if business brings me back to Geneva.