Had a great stay in Guillaume's place, we hadn't been to Batignolles before & thoroughly enjoyed ourselves in this neighbourhood - there's a lot going on but it's not noisy & it feels very safe. Also transport connections are great with a choice of Metro lines into the centre of Paris.
The apartment itself suited us well and was well kitted out. Being mother & daughter, we used both the bed and the bed settee - the latter was a bit hard for me but would be fine for someone who prefers a firm mattress - and there was loads of good wardrobe/storage space in the bedroom section. Only slight gripe was the lack of the advertised coffee machine but we managed to find a way round this - also the immediate area is well-served for cafes!
Guillaume was very helpful in terms of local recommendations and also somewhere to leave our bags for a few hours as our Eurostar wasn't leaving until early evening.
In short, we had a great time and wouldn't hesitate to recommend Guillaume & his apartment.