It definitely bumps your speeds if you're in an XLTE area. Been running it for a few weeks with no issues.
All I would say that thing is useful for is
Ability to edit apn
But even the XLTE indicator doesn't work right cause the phone will display XLTE even when your on regular band 13 LTE.
If I understand Intell correctly, you'd need to extract the files from the .ipcc file and then manually place them inside the correct location through iFile. Probably much easier to use iTunes.
On Verizon's website it says that there won't be an indicator to notify you that you're on a XLTE tower.
Why would this hack want you to include a XLTE indicator that is always displayed, even when you're in a regular LTE tower.