My husband, me and our 2 children (9 & 10) had a very good time in Mazamet. We went for 10 days and had a very active holiday! We crossed the Passerelle to Hautpoul, a worthwile walk/climb from the house to the old town of Hautpoul. We visited the lake de Montagnes for a swim, a beautiful place for swimming and relaxing, if you don't mind the rocky underground in the water ;). We went canoeing and even went fishing for trout in Gourp de la Loutre, what an adventure catch the fish, cleaning it with the nice owners and grilling it on the BBQ the same evening! A visit to Carcasonne (+- 45min drive) is interesting if you have some money to spend in the many many souvenirshops restaurants and extra activities (the Chevalerie was definitely worth the entrance fee).
All in alle we had a great stay in Felicity's garden, but it is advisable to find activities outdoors every day. Despite the beauty and cosiness of the small oasis in the town of Mazamet, it was not really an option to stay near the house fot a whole day: without a swimming pool or the space to run around for the children, we needed to find something to do every day (which made our vacation interesting, but a little more expensive than we anticipated ;)
To sum up, Felicity was incredibly kind (she even had some food and drinks for us in the fridge on our day of arrival!), the house was clean and completely equiped with everything we needed, and if you kept the shutters closed during the day, it was cool enough inside without airconditioning. We had a lovely holiday, but just maybe next time we will try to find a place where it is also possible to stay put and relax without extra outdoor activities.