I brought this device 7 months back and from past 45 days it is with Apple care support team and they are changing parts one every day basis, on every visit its motherboard get replaced and currently almost all parts are replaces except body and screen and key board.
I visited 3 service centres for the repairs and most of the complains I encountered was with macbook air only.
I strongly no not recommend buying Macbook air to anyone.
Always visit reviews to find the actual issue before buying