InvisibleShield Question?

[CosmoPilot]

I received an email today from Zagg stating I had been selected to send my phone in and receive a free InvisibleShield with install. I pay for initial shipping to them, and they take care of the rest.

My question, is the InvisibleShield worth it? I can suck it up and revert back to my 800w for a week or so knowing I'll get a good install and my phone will be protected for a long time. If the Shield needs replaced 2 or 3 times a year, then I don't see the utility in sending them my phone.

These have a lifetime warranty, so I can always get a replacement if it goes bad.

Do these things effect the smooth texture of the screen such that using your finger to slide around is more challenging?

I appreciate any thoughts or comments on the subject.

Cosmo