V good commute if you want to live outside London and work in the city or West End. Sevenoaks itself used to be quite boring (although I haven't been there for a good 10 years so I daresay it's more interesting now!) but it's got beautiful countryside around it. Parts of the town are very pretty - nice cricket green for example, I think (if it's still there - it's near a nice pub I used to drink at when under age.....).
If you can face adding to your commute (by 10-15 mins) and want to live just outside it, there are some lovely villages. There a quite a few new build "executive" homes that are very grand and expensive, that are near the station. There are some late Victorian/Edwardian semis and some 1920s/1930s semis (and detached I think) near the station.
I don't think state primary schools are all brilliant but some seem good, especially in the villages near it. The private schools in Sevenoaks are very good.
Secondary school options are good as Lady Macnet says. Grammar schools in Tonbridge are the nearest - as I'm sure you know, they are excellent and some of the best state schools in the country. I went to the girls one on and off for a bit - lots of children from Sevenoaks went to the Tonbridge grammar schools then but I know catchment areas have decreased - worth a call to Kent county council I think though, especially as there are no grammars in Sevenoaks so if a Sevenoaks child passes the 11+, that is their nearest option. And Sevenoaks school itself is fab if you have the money and a very academic child. They just do the International Bac instead of A-levels now (which I think is better for most children but depends on the child). It's very sporty, musical and has great drama facilities (I also went there for a while!). Or Tonbridge School if you have a boy and want a very traditional education (and have pots of cash - it's v v expensive, even for day pupils - even more so than Sevenoaks).
We're in the process of trying to find somewhere to move to aswell at the moment and considered it. But, personally, I'd prefer to go further out, to Tunbridge Wells and have more of a commute than live in Sevenoaks, I think... (Prettier and more lively, I think, better state primary schools, option of the T-Wells and Tonbridge grammars plus good private schools at secondary level if you want/can afford that.) However, we're going to stick to London for now - maybe we'll move out to Kent next time!
Sevenoaks is right on the edge of the M25 too which is fab for airports/general getting to other parts of the country. Wouldn't want to commute on it though.