Guy's thanks for the input. A gentleman at a local smoke shop thinks the warranty would be voided.He says my friend could get his own app & reregister the Crafty
as his own and the setup would work fine but in case of a problem, S&B would only recognize the original owner for warranty claims and that the serial number of the unit being reregistered voids the original agreement. I can't see any way around this, can you?
From Support page at S&B website, under "Purchase and Warranty":
What is covered by the warranty?
The warranty covers manufacturer defects within the warranty period. The warranty is 3 years with the VOLCANO and the PLENTY and 2 years with the MIGHTY and the CRAFTY. The warranty will be valid for any original STORZ & BICKEL Vaporizer, regardless of where it was purchased. Defects due to normal use or wear are not covered by the warranty. Parts subject to wear such as batteries, screens, and similar are excluded from the warranty.
Where do I register my Vaporizer?
The proof of warranty for the Vaporizer is your invoice or sales slip showing the date of purchase. We do not have an extra warranty card in the box and you do not have to register for it.
Is the warranty valid, although I did not order directly in your store?
The warranty will be valid for any original STORZ & BICKEL Vaporizer, regardless of where it was purchased."
There is no registration process, only a claims process.
There are references made to "registering" with the app, but this really on means "pairing" a Crafty to a given phone/device, and it can be changed at will.
Lots of folks here have reported that, even as second-hand owners, they have received warranty service.
I see some people upgrading to a Mighty but I don’t feel a Mighty is an upgrade except for the price. Sure it costs more but it does exactly the same thing as the Crafty does just for longer & with less options.
It feels cheaper than the Crafty & the screen looks a bit crappy for the price.
On saying that if battery life was was a primary concern I’d buy the Mighty instead.
Materials/ quality of build are almost identical, so I don't agree that one "feels" cheaper than the other. Screens are identical and inter-changeable (unless you're referring to the temp readout screen!, which, on mine, has been flawless for 2 years now).
@biohacker is correct that heatup time is faster with Mighty and it (and it's batteries!) stay a little cooler during use.
Because there are two batteries in Mighty, their useful lifespan without replacement will be approximately double that of the single one in Crafty.
The charging circuitry in Mighty is more robust (at 12 volt vs. 5 in Crafty's usb method) and Mighty will charge to full faster than Crafty.
Mighty uses pass-thru charging and can be used as a plug-in even when batteries are depleted.
As for less options, I consider Mighty's on-board temp. status read-out and controls to be an advantage over needing to use a separate device to control Crafty. For me the app is just kinda gimmicky, other than the readout of #hrs total usage, which is 'interesting' but has no practical application.
(I've owned 4 Crafty's, but only one Mighty, which has outlasted the combined life of the other 4.)
, I switched the battery in my Crafty at 343 hours. 
