We have lived in North Lakes for over a year now and feel really settled, it really depends on personal choice really which you won't know until you get here. There is a lot of building and development in North Lakes so its a very new area. We live nearer the lake so the properties and land size is bigger and also older and more established then at the back, it really depends on your budget and type of property you are looking for. Mango hill is also a good area with some nice good size houses. We like NL/MH as its near to all amenities, sports, parks, it's not too far from the beaches and commute into the CBD is fine, obviously at rush hour then there is traffic but again depends on what you are used to in a commute, my husband commutes in regularly and doesn't have a problem with it, he says it takes around 30 mins. There are 3 main primary state schools in NL and mango hill, North Lakes state college which is from prep to 18 and has around 2000 pupils, then there is also mango hill primary which is new, small and has a great reputation and Bounty Boulevard primary, the primaries depend on where you live as they are quite strict with catchment areas but if there is a school you like it's always worth trying to apply, may be worth arranging a tour of the schools to see which suits. The primaries then feed into NL state college or I think Kallagangur but I'm not definite about that. There are also quite a few private schools in the area which are a lot cheaper than in the UK but its all personal preference really as to what suits your family.
Hope the move goes well for you and if you have anymore questions just ask, if you fancy a meet up when you get over let me know, we have a 4 yr old and 2.5 yr old as well.