If we all throw in $25 to ship some ones bike will they rewrite ignition and fuel? It would be worth $25 to just know what the real difference dropping $1000+ in performance upgrades if it is worth it.
The way I understand how this works, according to other bikes like the BMW, once you own the rexxer, you send him info, parts changed, dyno sheets etc, the more the better. Then he sends you the new map for you to upload. I haven't asked if the maps would be able to be shared, might not, as each rexxer is mated to your vin. I'll ask him about it.
He needs the ECU or bike, to basically crack it the first time, and write the parameters for our bike, TR650. The Strada, with ABS, would be the best bike, but he can work his magic off of just an ecu, then fine tune more maps on the fly so to speak. This is what he does for a living, and a good guess at a map, with his experience, will most likely run circles around any moss tune. All the plugs and interface exist already too (BMW 650)
Ultimately, having a bike on the dyno, he can fine tune a base map to sell with the Rexxer unit. Most people, will have mods done and need a custom map anyway, and the dyno sheet with tables is what he would go off of.
Later on, or years from now, if you wanted a new map and not want to spend the $600, you can send the ecu and he updates the ecu with known good map. That is what most people seem to opt for, and the reviews are pretty darn good. I myself want the tool.
Right now, most of us are under warranty, but I assure you, $300 to make your bike run perfect is not that bad, especially when you consider what most shops charge, and multiple tries.