What you actually get
Four Wispas, four Crunchies, four Boosts. Twelve bars, 347g, all Cadbury. On Subscribe and Save it lands at £3.80, which works out to about 32p a bar. That's not outrageous at all - a single Boost at a corner shop will set you back 80p without blinking.
Personally, the mix is well judged. Wispa for when you want something light and airy. Crunchie for that honeycomb crunch that gets everywhere. Boost when you actually need the sugar hit at 3pm on a Tuesday.
Who this is actually for
Honestly, this is a drawer-stocking purchase. The kind of thing you chuck in a kitchen cupboard and forget about until someone comes round, or until work gets grim. My mate keeps a box like this in his office and it's gone by Wednesday. Every time.
It's also decent for families. Kids' lunchboxes, road trips, that sort of thing. The bars are standard size, not fun-size, which matters.
Where it falls slightly short: if you're fussy about which Cadbury bars you like, you don't get to choose. No Dairy Milk, no Caramel, no Roses. You get these three and that's your lot. For most people that's fine. For the Caramel devotees, not half as exciting.
The Subscribe and Save bit
The S&S price is where the deal lives. You can cancel after the first delivery, which people do all the time. Just don't forget. At full price it'd be less compelling, but at £3.80 for twelve bars of proper chocolate, it's spot on.