Found this recent video that was posted by a 3M distributor. It appears to be a lab technician/engineer who is doing testing on the 3M PPF versus the Xpel, Stek and Suntek competitors. The 3M film appears to be the thickest of the group and appears to come out of this test with the least amount of damage. All of the other films were similar in thickness but still appeared to incur different amounts of damage.
I think any PPF is better than none but I think this is an example where you have to consider a balance between protection and appearance. From my experience, the Suntek/Stek films have a significantly better appearance (less texture, more clear) than the 3M product. They are also more appropriate for using on cars with complex curves which becomes important if you are doing a full vehicle PPF job. But if appearance is not a concern and the highest level of protection is desired, perhaps 3M does have a better product? www.youtube.com/ watch?v=n2FOabQPBz4