My wife and I just moved here from Long Island, NY and we saw Cote D'Azur and Sanctuary Green during out
condo tours (can't comment on Butterworth).
We ultimately decided on SG because the apartments are huge, the grounds are like a resort and its quiet. We have been in the condo for 2 months now and have no regrets. There are many families here (we are expecting in May) and the condo has a FREE private shuttle bus that runs all day long in hour or half hour intervals depending on the time of day. Sanctuary Green all the way, we thought Cote D'Azur was a bit run-down and old.