i have used 6 sp since i bought the iphone.From my experience the worst i use is mirror sp.Easy to scratch and got many fingerprints. Then im not satisfy i bought another one mirror sp, this time are more more expensive. It was sad to see cos easy to scratch.Then i tried matte/anti glare, really satisfy me for few months,then i realised that the brightness are so dim.Finally i change back to clear type normal one. RM15 each.

My advise,if u want to use mirror sp,must bundle with leather casing like n95 so it wont scratch the sp.
Matte or anti glare type suitable for all casing type.No fingerprints and scratch proof but very dim.
Clear type. Scratch proof better than mirror type.
Make sure u guys bought the full cover sp,some without covered at home button.The dust will stick at home button if not full covered.