DS now knows where the greatest wisdom is, and, when I confessed I don't know that much about them, said, 'Can you ask MN?' 
What's the advantage / disadvantage of him setting up a LISA vs a Help to Buy ISA ?
If it matters, he's 23, in regular work but a pretty low salary, and knows he doesn't earn enough to get much of a mortgage yet so would probably be looking to buy in 4 or 5 years at least, maybe longer down the line.
He has read all the Martin Lewis website but wanted to check with me if he'd missed something / if he'd understood it all but I don't really know anything about the schemes.
We know the 'Help to Buy ISA' is closing to new entries soon so wants to start now if he can.
What does he need to know ?
TIA