It is actually more secure than you may imagine. I was skeptical as well. I signed up through IRS.gov. I used my driver's license. The great thing about it is that once 10 mins later after the app on your phone and verified email, I was able to get a new IP PIN which was absolutely required to e-file my returns to the Fed and State.
Otherwise, I would have to wait for weeks for the IRS to mail me one.
That is your choice, obviously. I also find it comforting to have some protection through the credit bureau for id theft. More $$ out of my pocket, but peace of mind...
