I don't know just how high it'll work, but it works just fine in a 150km orbit. Running at high time warps produce basically unusable maps, 100x is the fastest I would go. 50x produces a map with minimal pixelation if you're willing to wait a little however. I do have a bug to report - I landed on the Mun, started mining and turned up the time warp, and the fuel in the pocket went down as expected. However, when I switched back to 1x time warp, the kethane level of the pocket jumped back to where it was before I engaged time warp. I was running the extractor, detector, and converter all at once at 1000x time warp. Other than that, this is my first time using this plugin and I must say it's rather nifty and I hope to see more in the future.