I met with an iPhone 7+ user whose home button is not responsive sometimes. There is haptic feedback but no 'home' function. Any idea what might cause this? My 7+ have no issue with this.

Just wanna share my exp with this casing with you. I got the Power Support Air Jacket clear casing for my iphone 6+. Putting it on for the first time can be quite struggling as wraps the phone very tightly. If you are using a Jet Black model, it's best to stay away from this casing.

It was a beauty, the surface feels nice to touch and you can tell a difference in quality of the polycarbonate shell compared to cheaper clear casings. The ugly part came few months down the road. The marketed 'self healing coating' started to peel off. To make things worse, it got stuck to my wallet and it was quite impossible to get those tiny pieces off. Eventually the peeling was so bad that I have to carefully polish off the remaining coating.

However it did save my phone. There was once I put it in my backpack and forgot to zip it up, I suddenly turned around to get sth, and my phone went flying out landed on the road. Luckily I had a Power Support screen protector also (not tempered glass) so no damage to the screen.

I can't comment whether they made any improvements on the 7+ casing or not, but I would really recommend their screen protector if you are not a fan of tempered glass

P/S I'm currently using Element Case Aura for my 7+ and I'm very satisfied with this casing.