I spent a lot of hours on vanilla Fallout 4 and I did fire it up again on my current system to compare and that still seems to run fine. Unfortunately, this mod appears to almost make it unplayable because of how often it crashes. I made it through the first and took my time there. About an hour or so and didn't have any issues. But the minute I surfaced into London then it's been constant crashes. Sometimes I'll get a minute or two of playtime and the longest I've seen so far is about 20 mins. The voice acting is great. The Britification of the items is great. What little I've seen of London appears to be great. But the constant crashes......