I've attended the Darts World Championships here twice and the Snooker World Masters. Great venue for both.
For the darts a large hall is filled with lots of choices of food (the pie & mash bus is good) a large bar, bookmakers, and fun & games including a 6 dart challenge to win a prize for the highest score of the night. Beer's not cheap but definitely not as over-priced as many other sports venues.
The arena where the matches are played on stage holds a fantastic atmosphere that is felt wherever you sit. The more in the middle and near the front the better for that and if you get seats on the tables on the left hand side next to the walk-on aisle it's a good chance to get close to the players as they come on for each game. If you want to wave to your mum or get your banner seen the front left quarter is best for getting on TV too.
The stage has two large screens either side of the board to watch the play as you can't see the board well enough from the seating area. These show the same coverage as on Sky and are clear for everyone to see.
It's quite a long walk to the toilets from your seat wherever you are as they're down the corridor, across that hall and up the stairs.
For the snooker a large hall is again filled with attractions such as a snooker shop, exhibition table which offers an opportunity to get involved and an autograph table for a chance to meet the players. There's a pub/restaurant which we ate in between sessions and the food and beer was good here and I can't remember the prices being too high.
The view of the table is good wherever you sit and screens above are useful as you don't often have the best angle to watch shots. If they operate the unallocated seating plan it's of course a good idea to get in there early, although there's a decent view from all seats, we were slow to get in for one session and couldn't find 2 seats together.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.