Hello! I?ve got to declare a cross over here as I?m a mum and use netmums normally - but I also actually work in this industry and so know a lot about these black boxes. I?ll stick to the facts and hopefully that will be helpful.
Premiums for young people can be outrageously high and fitting a black box to a car can be a way to save a lot of money for them. These boxes are sometimes called ?spy in the car? or ?black box? ? but the buzz word is ?Telematics? and therefore when you?re googling around that?s a good one to use because you?ll find lots of reviews and information about it easily. As a starter, the aggregators (like moneysupermarket, gocompare or confused) have good, unbiased reviews, so you might like to check them out.
Telematics helps young people prove they drive more sensibly than some of their peers, can help teach them how to drive better and can reduce fraud ? that?s why the prices are better. It?s a fairly new development in insurance, but uptake is fast and it's no longer unusual.
There are a few different Telematics providers out there, but their products do come with very different conditions. Eg The night time curfew you are talking about is something which some providers have (giving costly penalties if you drive at night), but this is not the same for all ( insurethebox don?t). Some products change the price depending on how you drive ? judge each one separately.
As mentioned above, renewal prices are influenced by how well the customer drives, which means that young people can prove they are not a boy racer and earn a price which reflects that. The insurance companies are obviously very motivated to attract drivers they know are better than the norm. You could think of this a little bit like a fast No Claims Bonus ? the young people are quickly proving they are a better risk. (This varies between the telematics companies, so have a look at what they say)
For insurethebox specifically:
Insurethebox are the biggest telematics provider in the UK. When you buy a policy it comes with a telematics box fitted to the car included in the price. The policy is limited mileage ? that means the standard product offers 6000 or 8000 miles, and then you can buy ?top-up? miles if you drive more than that in a year. You also earn ?Bonus Miles? every month if you drive well, and this comes with feedback to an online portal which would help your DS know how to improve his driving (night time driving is one of the things that can affect bonus miles).
Insurethebox also has their ?Accident Alert? service ? if the box detects an impact to the car the call centre staff know immediately. They call the policyholder?s phone to offer assistance or even call the emergency services directly if they think the situation is serious (eg very high impact, the car has flipped, it?s late at night on a country road etc). The box can also be used to prove what happened around a crash which helps if the other party has a ?different? version of the truth.
There?s a video on the homepage of insurethebox website which is an easy way to get more of an explanation.
On top of all the above, I'd recommend anyone out there who has a daughter thinking about insurance to check out the changes the EU are bringing to car insurance in December. It is going to become illegal to charge different amounts for girls and boys and girls' car insurance is likely to go up a LOT. Research in advance! (Google "EU Gender Directive/Ruling")
Hope that helps a bit.