Ipad air 2 is the best ipad I like because I am using it from one year and till now it has never hanged once butit does not have the ability of picking up wifi range from far away distances . I can connect wifi in my mobile but my ipad is not able to catch up the range . The ipad is very quick and is reliable and it supports external storage. of 32 GB and internal of 64 GB. It has less RAM but it gives more pressure on its processor, so it does not hang up.