ZIPAIR Fast Entry

Hi everyone,

I am planning to fly ZIPAIR from Houston (IAH) to Tokyo Narita (NRT). While looking through the optional services, I noticed an add-on called ZIPAIR Fast Entry.

From what I read, it allows you to use a fast-track/priority lane for immigration at Narita International Airport.

Has anyone here actually used this service? I am curious to know how much time it actually saves and if you think it is worth the extra cost.

Any shared experiences would be greatly appreciated.