I have the Air 2 and could not be happier with my iPad. I had the 64GB model which had a spec of dust under the screen. I was going to hold onto it until I saw Best Buy had $100 off the 128GB Air 2 making it the same price as my 64GB. The 128GB is perfect. In fact, out of all the Apple devices I have owned, I'd venture to say the iPad line up as a whole is the most reliable.
Reliability is not in question, I have owned every iPad myself with the exception of iPad 4 and iPad air 2. GB size is irrelavant too...I'm questioning all the screen flaws, scratches, dust patches etc that most members have been complaining about.