1. Spooky2 apparently has remote mode. That is, it can be completely wireless and can be used anywhere in the office or home. That said, I've never tried it myself. But... if it does work, then it would render contact zapping redundant in many cases.
2. How portable are Rife machines? ie, can people use the contact tubes and foot pads while driving a vehicle or shopping? From what I can see, portability in such cases would be limited to wearable electrodes. Whereas other electrode options remain stationary.
3. Stating another machine is "probably" less accurate than another seems more like wishful thinking at this stage. - We need testing
That said, the Spooky2 devices could definitely use some refinements. Such as with portability and connectivity with Android or an iPhone. Furthermore, it could also use local programming capacities so as to upload program sequences into the device rather than to run it off a computer. And finally it could definitely use a new name so that it doesn't sound like something straight out of the Twilight Zone!
However, if someone is looking for the ultimate in zapping, I can't think of anything that comes close to the Spooky2 device in terms of versatility and price. Which seems to be the best there is on the market. Whereas everything else seems like a compromise. Such as where portability is exchanged for fixed frequencies and programming etc. etc.
Then again, this is all good in fact. As this tells us that there is still plenty of room for better products.