Ha, I had 2 “financial reviews” with them, one ad hoc and one timetabled.
They wanted to sell me first a Stocks and Shares ISAs, and the later, their “Investment Hub” and insisted that I put aside an hour for the appointment. I was out of both within 15 minutes as I refused to invest in anything where I could lose money. I made this clear at the time of the latter appointment but I guess they thought the powers of persuasion would prevail.
So long as you stick to the FSCS limits your balance won’t go down (unless you withdraw) on any straight forward UK savings account - not just NS&I. Even one with a derisory interest rate.
On the flip side when inflation is high every single one, even the most generous, will lose value in real terms.
With investment products the value of your deposit can go down as well as up, although on the flipside could potentially outpace inflation even when rates are high.
I’ve got the Edge account so it’s £500pm minimum and £3 fee (which is nicely offset by the 1% cashback on utility bill & (latterly) supermarket spend).