A lot of people will have woken up on Christmas Day to a new Kodi box beneath their tree.
But you could find yourself in trouble if you use them under certain circumstances.
The Android boxes have proved a huge hit with people desperate to watch PPV films and live sport, including Premier League football, on the cheap.
But it turns out there is confusion surrounding the legality of devices, and it depends how they're used.
And with a trader being hauled to court in a landmark case over their legality many are wondering if the boxes will be legal for much longer.
Are they legal now?
It's a huge grey area.
The problem with Kodi is this: although it utilises perfectly legal and easy-to-use software, it can also be easily used for illegal streaming. Subscription sports and movie packages, for example, are only a few clicks away – and all for free.
Put simply: Kodi, and boxes with Kodi installed, are perfectly legal. The problem arises when the Kodi app is used to illegally stream subscription content.
The confusion around the legality of the boxes is so great that it could take a court case involving a man called Brian Thompson from Middlesbrough to help settle it.
He’s thought to be the first man brought to court to face allegations of selling pre-loaded Kodi or Android boxes. The boxes allow you to watch and stream offline and online content.
The boxes themselves are, effectively, legal.
But the problem is with pre-loaded or altered boxes to watch PPV content, like Sky Sports or films currently in the cinema.
That, claims prosecutors, is illegal.
So when will we know?
How long is a piece of string?
Thompson entered not guilty pleas at court and a trial is expected to start before a judge on May 8.
But even if he loses the trial, Brian has already said he intends to fight any decision - even hinting he could take the fight to Europe.
That could result in a lengthy court process which could drag out a definitive ruling on the devices.
Are there any other similar legal cases?
One has just finished, and resulted in one man receiving a four year jail sentence for conspiracy to defraud.
In what was first to be the first sentencing of its kind, Terry O’Reilly was handed the tough term for flogging over 1,000 boxes to pubs, who used them to illegally stream Premier League footy.
Following the result, Premier League Director of Legal Services Kevin Plumb said: “The courts have provided a clear message: this is against the law and selling systems which allow people to watch unauthorised Premier League broadcasts is a form of mass piracy and is sufficiently serious to warrant a custodial sentence.
“There can now be no doubt for consumers that these systems are illegal.”
So are they still on sale?
They are, and there are loads of them.
The case involving O’Reilly was for a conspiracy to defraud, a less serious charge than those Thompson is facing.
His charges, which his solicitor claim are used under an “unusual piece of legislation”, see him accused of selling boxes “adapted for the purpose of enabling or facilitating the circumvention of effective technological measures” and a third charge involving “advertising a product to circumvent technological measures”.
That case focuses specifically on selling pre-loaded boxes.
Until that, or another similar case, has gone through the courts it is likely they will still be sold on the high street.
Currently, a quick internet search shows retail giants like Tesco and Amazon are selling similar devices, although they aren’t pre-loaded.
What’s happening in the pubs?
In October, bosses at a pub in Middlesbrough called the Navigation were fined £8,000 after being caught streaming matches through a Kodi box.
And in a show of support for Thompson in his home town, there is a sign up in the front window of another pub warning that anybody who works for the FA, Sky, BT, the Premier League or its “servants” are pretty much barred.
It warns that anybody from those firms - who are leading the fight against pubs illegally streaming live footy - will face legal action if they set foot inside.
It states: “Any entrance by the above will be considered as trespass and as such any information gained would be by default.”