Question about elementary school orthodontic appliance

These days, there are methods that make orthodontic appliances look like traditional prosthetics, and also transparent methods like Invisalign that allow for easy removal and management.

Are there any advantages and disadvantages?

It seems like Invisalign is more expensive.

Invisalign... is very expensive.

Invisalign... I forgot the word that comes after it... I heard you recommend it... and the price range is also cheaper than Invisalign...