If you are looking into buying this version, don't. The original games are, with just an .ini tweak (and optional graphics mods that look wayyyyyyy greater), better than this.
I bought this version before I got D3 + Expansion with D1 & D2. At first, I thought I wasn't missing out on much. But then I wonder why this version is so freakin' bright compared to the original. The original's darkness was actually a plus, it gave the game a better atmosphere.
The flashlight being attached to your shoulder in this version is actually more annoying than not. You see this huge white circular ray of light coming from the left of your screen. Not only is it disorienting, it also, like the extra brightness, kills the atmosphere of the game.
They made the game really easy with all the extra ammo pickups. I had full ammo on EVERYTHING before I went to that-other-place (Trying not to reveal spoilers!) halfway through the game. There is no element of ammo management whats so ever.
THEY CENSORED DOOM 2. They removed the Nazi references in DOOM 2 and censored the Wolfenstein easter egg. Why was this needed? The games separately on Steam still have the references.
Lack of graphics options. Literally the only options are Motion Blur, FOV, Max FPS, AA and AF. The rest of the textures are on Ultra settings. Now, this is not a problem for me, but for people with bad computers, this is a huge downfall, so take this part as for what it is.
DOOM 3 with just a couple of mods and an .ini tweak for HD resolution looks WAY better than this version of the game. If you have a moderate to high end gaming PC, the game looks like a next-gen game (other than some of the animations and modeling). Compare this: https://www.youtube.com/watch?v=hc4ZRMP9QyY
---- to this: https://www.youtube.com/watch?v=67TbmU9bAwI
---- and like I said in the previous paragraph, if you have a bad PC, then you can run at lower settings unlike the BFG edition.
So overall, this point has been discussed many of times, but I felt like I needed to post this because of the sale. In a nutshell, this isn't worth it compared to just buying the games separately. The only real reasons to get this is for achievements and Lost Mission, but the Lost Mission is really short and isn't very polished.