Finally!

[infared]

Congrats!  Warning.  Now you will want another "L".  It is a disease!
 

...or TWO!!?..LOL!

[Boyer U. Klum-Cey]

F4 L, eh?  Solid tech with the lack of weight.  Congrats & enjoy!

[cervantes]

I actually shot it with my 5d3 and 100mm macro.

WHAT?
You got a 5D3 BEFORE your first L lens? It's interesting how people choose bodies over lenses while everyone "theoretically" knows that lenses are more important.
You need to get some serious L's for that camera.  But this is what you'll do anyway because now your officially infected. 

[greger]

Congrats. You will take some really nice pics with the 70-200 F4. Enjoy.

[webphoto]

Congratulations. It is an amazing lens.

[RickSpringfield]

Congrats! Based on that nice photo you took of the lens its clear your skills will put that lens to good use

[sandymandy]

You got a 5D3 BEFORE your first L lens?

I think 100mm macro makes sense to use it on APS-C I think it doesnt matter much what you buy first. Im also thinking if i should get an L lens before getting a FF body I can only buy one. So i can either start FF with 50mm 1.8 II or get some L (24mm 1.4 for example) and use it on my APS-C now already.

[RS2021]

Congrats!  Warning.  Now you will want another "L".  It is a disease!
 

...or TWO!!?..LOL!

Soon you will be singing the Trainspotting song which also applies to L lenses:

My therapist said, not to see you no more
You're like a disease, without any cure
I am so obsessed, I'm becoming a bore
Oh, no.
And you think you're so pretty!

 

[Zv]

That was also my first L and I love it! Great choice! After I saw the IQ from that it made me realize why L lenses were so sought after! Now for my first L prime!!