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I sent mine back too for a refund. I hated it. The prism effect on the screen blows, and the tacky material ruins the whole touch screen input.

Another vote here for fullbodyfilms.com, its perfect.

Oh, and from what I read the back for fullbodyfilms and the BSE are identical, so what the previous commenter said about all the materials being the same is wrong with respect to Zagg. Zaggs stuff is definitely a different from the other two. Its more tacky and less clear, and slightly thicker.

I stand corrected. I thought they all used the same 3M material.

As for the corners, the key is to let them sit a while before you even bother messing with them. Mine were giving me problems so I just walked away from it for a bit, about 25-30 minutes later I came back, pushed them down and the back looks perfect.
 
They are the film sets from Power Support - the Anti-Glare and the Crystal Film Set. Anti-Glare is matte finish and the Crystal is more like the original iPhone screen (kinda like Matte vs. Glossy Macbook Pro screens).

I originally had the Invisible Shield/Zagg full-body but immediately took it off when someone showed me their iPhone with the Crystal Film Set on - you virtually could not tell that it was on.

I didn't like the Invisible Shield:
1) The screen was distorted - added lines to the screen
2) Tacky feel the screen (similar to the backing)
3) The texture looks weird

IS/Zagg Back + Crystal Film Set Front is your best bet

My iPhone came used with the invisible sheild on it. I didn't like the sticky feeling. It was hard to slide my finger around on it. Also, it looked bad on the corners. It just made the phone feel weird so I took it off. I now have a TuffShield screen protector on the front only.... it's waaaaaay better.
 
So put it on last night PAIN IN THE ASS

The back was unbelievably hard. The corners are also a pain. i have REALLY small bubbles which is fine, there pretty much flat. I like the back OVERALL but again, the corner pieces aren't shaped good.

We got the front on easily, but the lines in the morning that came up which were like the streaks across the screen WERE REALLY ANNOYING so i just took it off...i can put it on later if i realllly want to but the back was my main concern on the 3G and now its covered...so pretty satisfactory
 
In a word: no. In two: it's crap.

Saran Wrap is definitely the best way to describe InvisibleShield, as already mentioned. I tried the Crystal protectors as well. I'm just going to have to love my iPhone au natural, scratches and all.
 
I installed the InvisibleSHIELD for my iPhone 1st gen, a Motorola L6, 2 T-Mobile Wings, a Garmin Nuvi, and 2 Dell XPS m1330 laptops. So obviously after that much practice, I have pretty much perfected the art of applying it on products :D The trick is to use copious amount of the solution on the shield in order to postion it easily, and then hold it down with one finger in the middle, and squegee out the water using a plastic card like hotel room keys, moving from the center outward. Go slowly, and don't apply too much pressure to get the water out.

I have no issues with the feel of it, but then again, I haven't felt anything different. The one BodyGuardz shield that I recently applied for my brother's iPhone 3G felt similar to the IS to me. The one issue that I DO have with the InvisibleSHIELD is the way they look. For some reason, over time, my shield for the back of my iPhone turns yellow. And also, the dust/grime that collects in the shield-less places(Corners)looks horrible! I am looking either for a solution to the problem or a replacement prodcut. Can anyone suggest anything?
 
I love InvisibleSHIELD! I don't have an iPhone but I do have one on my Nano and on my iPod Touch. It does make the screen on the Touch a little more "tacky" but I don't find that it hinders use in any way! I will also agree that the corners are a little wonky, but that is my fault as I applied it a tad bit crooked.

I think they are definitely worth it in terms of preventing scratches and fingerprints; at least for me.
 
Like someone else said, Power Support Crystal Film over IS screen protector hands down. Actually I'm begging you not to waste your money.

Go to Apple Store and ask to see what it actually looks like on an iPhone. You will rip your IS off right then and there. You can't even tell its on.
 
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