I think movement is too slow, but it's not a huge deal. I will use the hack and be happy about it, but I don't think it's game breaking or anything similarly overdramatic. For some that are experiencing super slow movement, it COULD be your system/settings. If you have the graphics settings too high, it can appear as if movement is slow when in reality it's your system not being able to keep up with the graphics. In my experience with this game (through Alpha and Beta, now release), it's a good idea to set the graphics settings one step below what the auto-detect determines. I had performance issues with it set on their recommendation, but bumping it down a notch works great (and I have a very powerful/fast machine).

Question about the hack. Do I need to keep Cheat Engine running in order for it to work? Or does it apply the setting permanently?

Also, a warning...Cheat Engine comes packaged with spyware/adware Conduit, so if you aren't careful and don't uncheck for it, you'll have some fun surprises coming your way.