What age child have you got Peig? It depends what you are looking for really.
Most parties our DCs have attended (or we've hosted) there have been for children in the age-range 4 - 9. The staff do the lion's (or should I say 'tiger'!!) share of the work, but it's not particularly cheap and if you're having a party there for an older child, you may run the risk of having a few jaded 'been there, done that' children on your hands.
The laser parties look great but are relatively expensive. But many children long to go to one! And they tend to take place 'after hours' so the party guests have the run of the place.
Also, if you organise a party there at the weekend it can seem a bit as if you're on a party conveyor belt/production line, often with several happening simultaneously. Weekdays, after school ones tend to be quieter and possibly slightly cheaper as far as I can remember!
But most children seem to love going to parties there and it's convenient for parents, with parking, shopping and good public transport links close by!