Recent reviews by High Fidelity

Pros:

• Lebensauger .308 is the best all-around Sniper Rifle in the game; its high rate of fire making up for its relatively low (for a sniper) base damage. Can act as a mid-long range shotgun if you add a non-scoped sight
  
• Kross Vertex SMG has an excellent rate of fire, high base damage, stability, magazine size, and fast reload speed making it excellent for CQC. It's only real shortcoming is its accuracy. However, this doesn't mean it's unusable at range.
  
• The Shuriken provides a cool alternative to the playing cards in terms of stealth throwables (+ you can pick them up again and use them more than once. Also they're poisonous.)
  
• The Masks are ♥♥♥♥♥♥' dope
  
• The Achievements to get the masks provide the perfect level of difficulty (some but not so much that I want to destroy my computer, unlike other DLC)
  
• The Empty Palm Kata looks awesome

Cons:

• The Pistol Crossbow isn't really as good as the Plainsrider Bow in terms of stats and handling, and not as good as the Gruber Kurz pistol in terms of concealment. Still looks pretty cool tho.
  
• The Melee Weapons don't really outdo anyone in terms of damage/knockdown or concealment. Still look pretty cool tho.
  
• Overkill will make you buy a completely different DLC if you want a katana
  
• ???

TL;DR the pros outweigh the cons.
It's honestly one of the few Payday 2 DLC that's actually worth it full price, so get it. Get it now.

A staple of the FPS Genre and a personal favorite of mine, World at War is simple yet elegant. Although the number of missions are limited, each one brings something entirely new to the experience, and they never seem get boring. Believe me; i've been playing this game on and off ever since it came out in 2008. The versatility of the 2 Campaigns really lends itself to the experience. You play as both a Red Army Soldier, surviving Stalingrad and going on to personally topple the Fascist Third Reich, and as a U.S. Marine, facing the harsh realities of war in the backdrop of The Pacific Theatre, watching your friends and allies die around you- from Peliliu to Okinawa- wondering why you have been allowed to make it this far as you burn your enemies alive. The gameplay is entirely ♥♥♥♥♥♥♥♥-free and will keep you going for hours on end. 9/10