We had a really nice week at 360 Sun & Ski in Les Carroz in February 2013. Caroline and Nick are generous hosts, the food was good and plentiful, the accommodation much more spacious than you usually get in a chalet (it's fairly basic, but you get a suite of two rooms plus bathroom and kitchenette), and the transfer is just 45 mins from Geneva.
Les Carroz is a nice little resort - not lively - but there are a few places to eat out or go for a drink in the evening.
The ski area is more spread out than we were expecting. It takes about 40 mins to ski over to Flaine, but when you get there it has miles of fast intermediate cruising and amazing views of Mt Blanc. Samoens and Morillon are quite small areas, closer to Les Carroz and with some good on-slope dining, but not very challenging skiing. Sixt is a 20-odd km ski from the top of Flaine along an apparently very pretty, wooded run, but we never made it over there and the only way back is via a bus to Morillon.
We put our 5-year-old in the ESI ski school, which he'd been in the year before in Les Gets and done well and enjoyed himself, but he failed to progress at all in Les Carroz. When we followed the ski school one morning we couldn't see any instruction being given and he was issued with ski poles halfway through the week when he could still barely cope with carrying and putting on his skis, so DH and I weren't very impressed.
Our week at 360 was incredibly good value. We literally couldn't have done it cheaper, even if we'd driven and self-catered - I did a spreadsheet to work it out! Consequently, it's almost impossible to get in during the school holidays, but if you can manage a week at any other time it's a good family trip at a great price.