Orthodontics - Are you using Invisalign First these days?

I received orthodontic consultation.

These days, they say a lot of people are using the Invisalign First device.

The prognosis is good, and the likelihood of not needing secondary correction is higher.

..It may vary from person to person..

Easy and neat, sticking and removing from the teeth? I'm thinking of going with this...

The cost is around 400, I think...ㅠㅠ

Do many people use this device???

How is it???