So you get to pick your seats a week ahead, rather than 24h.
You get to use the Business Check in; which often has a queue anyway.
Priority boarding, but you have a seat anyway, unless you're fighting for space in the overhead lockers.
Is there anything I'm missing?
I have a few months left before my year expires, and will be 25 points short of Bronze status. My flight has an offer of an extra £55 to upgrade to business (3hr flight), and then I'd get enough points to reach Bronze. Is it actually worth it though?
Next year I'll be flying Long Haul more often, but doubt I'll have the cash to upgrade to really rack up the tier points.