Good battery life on latest iOS. However sometimes a few apps crashes, especially Whatsapp when trying to multitask.

Since the edges of the iP6 and iP6+ is curved, you can't have the screen protection edge to edge.

I'm using Original Nillkin H+ Nanometer Anti-Explosion Tempered Glass Protector. RM35 only from here. Good installation package and tools. The screen itself has good fingerprint resistance/wipes of easily. Most cheap tempered glass SP under RM20 will have really bad fingerprint resistance. In addition to this, the Nillkin removes easily if you install the SP incorrectly. Cheap tempered glass screen protector leaves some kind of stain from the adhesive. The Nillkin one doesn't.

There are many sold in the market with proper and good looking retail packaging (and expensive too >RM50), but the tempered glass itself is inferior in quality. You won't go wrong with original Nillkin products from the seller above.