Even though I did not purchase a Pip Boy edition, I'll be using the app with Fallout 4. I must say the app itself is very responsive. Changing from one field to the other is immediate. And, that map is huge!
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i7 4790k @ 4Ghz, 4.4 Turbo
Asus Z97-AR
Custom Liquid Cooling
Patriot 16 GB (4 x 8 GB) 2133 @ 11-11-11-27
eVGA GTX Titan X @ Stock
Samsung EVO 1 TB SSD - O/S
Samsung EVO 1 TB SSD - Storage
Seasonic X-1250 Power Supply
Thermaltake Core X9 Chassis
Samsung UD590 3840 x 2160
Windows 7 Ultimate x64