Does it look better than the s7/gear vr, I suppose it's easier to get going too?
Yep it does. I think resolution wise it ends up being the same as an S7 which is higher than oculus/vive. Having a 90hz refresh rate and being directly connected via HDMI makes a big difference to the GearVR through riftcat in terms of how smooth it feels. I found the Gear VR good just to get an idea what VR is like but I wouldn't have used it for a race. This however I could see using for racing. Screen door is there but not too noticeable; I tried a vive once and screen door on that is a lot worse.
And yeah easy to set up; plugged it in and windows detected it and installed the Mixed Reality stuff and started the room setup. After that you just need to download the Windows Mixed Reality for SteamVR through Stream which allows SteamVR to detect the headset and that was it.
When you tried the Gear VR I guess you didn't have positional tracking? Having it makes a huge difference, but the setup I had for that with the Gear VR used Playstation move cameras and a move controller strapped to the headset. It worked, but it was clunky and needed a lot on configuration and apps running. With this Lenovo it just uses the cameras on the front and it's very good.