Any comments?
Found a decent deal but wanted to know how they fair as an airline.

Would have a long layover at Seoul one way - is there much to do there? Any trips out to the city worth doing as some airports organise?

Take a look here

British Airways = 5.6 / 10
Korean Air = 6.4 / 10
Qantas Airways = 7.6 / 10
Singapore Airlines = 8.7 / 10

ta.

How long is your layover? We had 18 hours, and after a good sleep and food, it didn't leave time for much else. We flew with Asiana airlines and they were ok.

Korean are excellent, good service, food and all their cabins are updated.

The Layover they take you straight to the hotel from the Airport, its nice - but your final destination decided which hotel you get (all are good, just in different locations). I got the one in Incheon City, which was nice, as the above poster said, not too much time to see much, but there are tours organized with the airport or hotel and you can get out a bit if you have a few hours.

I'm assuming you are heading to UK? You might want to check out Asiana as well. Their stop over is at the Royal Seoul in Myoung Dom (trendy area, night markets) takes about an hour on the supplied bus, you will arrive at approx 6pm and don't leave on the bus until 10.30am the following day. Dinner (basic) and breakfast (very good) is included.

I haven't flown economy with them since, well forever actuallyI'm Platinum Plus with Asiana and always find their service great. I can speak Korean so it helps, but other westerners in business always seem pleased.

I've done Syd/UK return 23 times, I think 16 of those with Asiana. They usually have great deals in line with KA.