An amazing experience, lives up to the hype, well worth seeing. Very easy to access via public transport to Pudding Mill Lane on the DLR, the arena is literally next to the station.
Recommend getting dance floor tickets and standing in the middle for the best effects, the projections don't work quite as well from the sides, and the seats are too far back to appreciate the detail of the on-stage ABBAtars.
Show is 90 mins without an interval and includes almost all of the songs you'll know (apart from Take a Chance On Me), and a few you may not know (The Visitors, Hole in Your Soul, Eagle, When All Is Said and Done) which are worth listening to before you go