If you've never been, it's underground and very red. When it's quiet it's lovely; when it's busy you can't move for over-inflated egos. However, the staff are generally pretty civilised which kinda makes up for what the clientele sometimes lack.
The WiFi seems to be an okay speed. There are many various seatings for the placing of bums on. A few sockets are dotted around the edge of the main bar area - not sure whether they're meant for public usage though. I had intended to have a mocha to test and was quite excited when I spotted a big tin of illy but it seems the coffee machine was turned off around 8pm. They offered filter coffee but I went with cola, which was only £1.50 - not bad for such a generally swanky establishment!
I'll have to come back to see how it pans out during the busier months (and to see if they make me unplug, which would be a bit of a dealbreaker) but for now I'm quite impressed.
And for those of you who don't frequent this sort of place, it's here.