I'm happy with the gameplay and level design. Although the loading times are quite awful for me, especially when you have to catch the train back and forth from one side of Prague to the other.
The vertical design adds something, but it does mean you can end up trying to poke at everything to find out if there's something new or hidden or different routes around.
Currently in the second dose of Prague after the Rucker mission.
Although that was slightly odd, the cinematic had Rucker with shaggy hair, then he stands up, the game shifts to the engine and conversation..and Rucker is suddenly marine buzz cut hair. Then cinematic and its back to the shaggy look.