Functional but disappointing especially given the glowing reviews.
Supplies were good, difficulty was reasonable, bot nav seemed fine. Hordes were unusually one-dimensional at times.
Unfortunately the visuals and level design are severely lacking in polish. Too many sparse or unfinished open areas, some strangely tacky and unrealistic graphics (like buildings with microsoft paint textures, multi-coloured lights and a green horizon), gaps in walls, many unfished edges and ropey textures.
The finale map was unnecessarily large and the escape vehicle was confusing with no visual indication that you should jump on the boat.