The Lion King is without doubt the best West End Musical production I've seen. I'd strongly recommend it to any families looking for a great day out because children will love it and not only because its based on the classic film but because they'll be blown away by the theatrical spectacle in front of them. Thats not to say that its not a great choice for adults too. Seeing the Lion King is a wonderful experience for anyone because of its top class actors, songs and sets. I'd like to draw particular attention to the costumes which are some of the most impressive and inventive designs you'll ever see on stage. All of the animals are beautifully presented on stage and you'll feel immersed in the setting from the opening number.
I will say that since the Lion King is so popular, its more difficult to find some of the deals available for other West End Shows. The best seats are particularly expensive and tickets often sell out so I'd recommend booking in advance. Having said that, I think that the Lion King is completely worth the ticket prices and if you're worried about costs, there's nothing wrong with taking a cheaper seat because theres no real bad view of the stage and the play is so brightly designed that you'll still get most of the impact from a back seat. I've even seen the play standing right at the back and even though my legs hurt from standing, it was still a great experience.