But good film, antireflection like it much better!

Already in my previous cell phone I got myself back a crystal clear and an anti-reflection film.
While the feeling when operating via swipe gestures is at the crystal-clear film just like on the bare display and this therefore only provides protection from scratches, you get with the anti-reflective film more:

The fingers glide more easily when the buttons on the display and fingerprints and smears are much less visible.

--- My comparison ---
Crystal-clear
+ Cleanest image
+ Protection from scratches
- Fingerprints and smears immediately visible (I had to constantly clean)
- Reflects how the naked display (if you like it, it is certainly not a negative point)

Antireflection FoliX FX antireflective screen protector for Samsung Galaxy S II (i9100) / S-2 GT-I9100 - Anti-glare screen protection!
+ Clean Image
+ Protection from scratches
+ More pleasant to use, as the fingers glide more easily
+ As soon as prone fingerprints and smears (I have not actually brush)
+ Anti-reflective works great and it reflects scarcely
And for the very meticulous:
- Interspersed the display light something. In (Super AM) OLED displays the sub-pixels adjacent to each other, so that they can be recognized when using the anti-reflective film may, if you look closely at all the white areas. The Samsung Galaxy S II, however, has such a fine display that is almost not noticeable, except if you want to recognize it. (When HTC Desire that was different.)

Both films are tailored and can be applied also in reasonably clean dust-free environment with a lot of care.

For me, the Galaxy S II wins through the antireflective film simply for quite a length at the input convenience.