When I first saw the clip, I found Matt's arguments confusing because the Impossible Project has more or less been the "standard" in instant film for a long time. (And I was surprised to see the Instax Wide 300 which I didn't even knew existed.)

Matt has several reasons to do what he's doing, but for me only three things are imortant: image quality, development time and price.

Having tested several different types of film, my experience tells me that Instax film is superior to the Impossible Project film, considering both image quality and development time. Sure, the Impossible Project film has "the right instant look", i.e. dull, wacky colors and blurry focus. But for the serious photographer that really cares about image quality, the Instax film sure has the edge.

Next up is the probably most important factor for a lot of people - the price. Let's start of by looking at some cameras. Note: All prices below are taken from Brunos Bildverkstad where I always buy my film.

Fujifilm Instax Wide 210 $124,30
Fujifilm Instax Wide 300 $248,73
Fujifilm Instax Mini 90 $222,73
Polaroid PIC300 $123,81

Instant film

Now, let's have a look at some film.
Note: Impossible Project films contain 8 images, whereas Instax film contain 10.

1-p 2-p 3-p 10-p
Impossible Project Color Film for 600 $28,49 $74,53
Impossible Project Color Film for SX-70 $28,49 $74,53
Impossible Project Color Film for Spectra $24,76
Polaroid 300 Instant Film $16,05 $24,76
Fujifilm Instax Instant Film Wide $32,23 $136,75
Fujifilm Instax Instant Film Mini $14,81 $24,26 $124,30

Now, let's look at some film prices per individual image, based on the largest available pack.

Impossible Project Color Film for 600 $3,10 per shot
Impossible Project Color Film for SX-70 $3,10 per shot
Impossible Project Color Film for Spectra $3,09 per shot
Fujifilm Instax Instant Film Wide $1,37 per shot
Fujifilm Instax Insant Film Mini $1,24 per shot

From this we can establish that if you use Instax Wide instead of Impossible 600, you don't have to snap more than 150 pictures to save as much money as Fujifilm's by far best instant camera, the Instax Wide 300, costs. If you on the other hand just want the simplest and cheapest alternative, no matter the format, Polaroid 300 is the choice for you.