Tryout guns from item mall

I've stubled on this youtube video lately from another cf version:
http://www.youtube.com/watch?v=F9wWQATli5I&feature=related

I this video I found the remarkable feasture that lets you tryout item
shop weapons without buying them yet!

Why does this come in handy? Most new players of the game will buy just an random gun and go spra*cough*play with it, like me.

First time i've played this game I just buyed an MP5, and later on I selled it to buy an MP7..
Why do you ask? several reasons: It is an higher number than the '5', and I actually believed the story of the armor piecing bullet thing..

So with this in the game new and more experienced players will get the opportunity to try guns before 'buying' them.

toughts?