@humax, having compared the VU+ duo & solo to the originals there is very little difference.
As an end user they work exactly the same and will run original images (for now)
There will not be a timebomb released as VU would not stoop as low as dream did in eliminating clones, they will just patch software in future that will not run on the clones, however then the clones will release a patch so they can again... it will be cat and mouse!
However I would say if you are going to buy as clone, buy one from a UK seller (assuming thats your location) and not from china as if it has a fault sending it back to china can be costly.