Not really for the New Sonders Original
I bought this controller for a new Sonders original I purchased in Oct 2017. I purchased the controller and gauge kit in November prior to the disclaimer being added to the Luna website that it might not fit new Sonders bikes and may require external battery case mounting. I had purchased the bike and controller/gauge upgrade as a Xmas gift for my wife. Shortly after Xmas I undertook the install only to discover that the controller is completely different physically than the stock Sonders version. The Luna controller is shorter by 1-2 inches and wider by about 3/8" and will not fit the stock Sonders battery casing, and worse yet, on the stock controller Sonders has the wires going to the gauge/brakes/power button all exiting from one side (top) of the controller and the motor power/hub sensor cables exiting the opposite (bottom) of the controller. On the Luna version all cables exit from one side of the controller which ended up being the bottom side to allow the motor cable to reach. At first I thought mounting it this way would not allow the cables running to the handlebars to reach but they ended up being tight but ok. But do not follow the clean routing of the stock wires. I had to do some major cutting on the interior of the battery case to get the luna controller to mount but after a couple of hours removing the battery case and using a hacksaw and dremel cut off wheel I was able to make room. It's an ugly hack and the wire routing is not ideal but it is all hidden within the case. Luna's suggestion to mount outside the battery case would be a non starter for me and I am sure many others.
Once my work was complete I was able to get it all in and it does seem to work fine although only one test ride so far. In hindsight I would not have purchased this upgrade and would not recommend it until Luna can get their supplier to upgrade the design to match closer to the Sonders physical layout. I don't believe this should be sold under the sonders parts section for the reasons above, any 20amp 32/48v controller would be similar. I am happy with the gauge so far though as it was an easy mount and plug and play and $50 cheaper than the Sonders version.