We just finished our review of the current 15-inch Surface Book generation. While Microsoft has done many things right, we take issue with one particular choice and there are one or two things we hope to see in future iterations. Depending on your preferences, it also does not have a clear advantage over its predecessor.
https://www.notebookcheck.net/Surface-Book-3-15-reviewed-Predecessor-achieves-similar-results.477082.0.html
Check into the 1T hard drive. I heard that one is faster. Sounds like they used the slower SSDs for sizes less than 1T.
It's taking longer than usual for notebookcheck to complete the Surface Book 3 review.