1. Screen protector - Expert Shield VS Martin Fields
I have used Expert Shield's and Martin Fields' screen protector for my last 2 PDA, Here is what I come up with:
Expert Shield
PROS
1) Scratch resistant, very durable
2) Washable and reusable with tap water
3) High transparency and surface is smooth
4) Package comes with cleaning cloth and sticky tape
5) Almost no screen glare
6) Perfect fit
CONS
1) A tad confuse at the installation instruction
Martin Fields
PROS
1) Scratch resitant, very durable
2) Washable and reusable with tap water
3) Screen is VERY bright
4) Surface is smooth and data input is easy and natural
CONS
1) No included tools for applying/removing the protector
2) A tad annoyed with the screen's glare when I took my P990i outdoors
Conclusion
Both Expert Shield and Martin Fields certainly risen to the occasion. After applying both protector and using it I found almost no difference between them except that Expert Shield's screen protector has a slight edge over Martin Fields' because of the screen's glare and it comes bundle with sticky tape to remove the screen protector if needs be.