I've had SGP protectors on all of my devices, and I never have had a problem with them. I use the Ultra Crystal, and it offers both great clarity and scratch resistance from keys and change in your pocket etc.
Which one is of course a matter of taste, the screen protector itself has 3 different versions for the iPad Mini available:
Ultra Crystal,
Ultra Fine and
Ultra Optics.
Then there is the
GLAS.t, which is a thin piece of glass that is glued on top of the screen, offering the same characteristics as the glass of the iPad itself, but being disposable and replaceable.
If you want full body protection, SGP IncredibleShield comes in four different versions: The glossy Ultra Coat for the
WiFi-only and
LTE models, as well as the Ultra Matte for
WiFi-only and
LTE. All kits include the Ultra Crystal screen protector, just the back and sides differ.