I am now testing Zwift, and it is entertaining and action packed. I am very familiar with riding CycleOps Virtual Training courses. When there are elevation changes in VT, they are usually very visible in the video, and there is a fairly large grade indicator to prepare you for changes in grade–ability to anticipate an upshift or downshift. The Zwift landscape photography is flat in viewing, yet the elevation constantly changes. If the elevation indicator bar was wider, or maybe even across the whole bottom or top of the screen, elevation change experience would be more realistic. Most people are used to reading from left to right, yet the grade indicator on my ride yesterday was in the upper right hand corner and read from right to left. I found that not very intuitive.