I'm in for a LISA but already a property owner, so I can't take it before 60.
My thinking is that my S&S ISA is essentially a retirement account anyway, so with the LISA I get a 25% kicker on all the funds put in, which is an unbeatable guaranteed return for an ISA investment. The downside (and admittedly, it's a big one) is I cannot use it as an early FIRE account given the restrictions on withdrawals.
I'm in currently as I'm making enough progress on my DC pension for the lifetime cap (as currently is) to be a potential issue, yet not at the point where I'm able to contribute enough to make the £20k ISA limit for the year. So I'm funding LISA up to max and then switching investment into the regular S&S ISA.
If you are close to the lifetime pension allowance (or on track for it) what is your FIRE date? This would change materially whether it's a good idea or not as I expect to be fully reliant on ISA funds ahead of taking my pension.