My 8-year-old daughter really likes 'rescuing' the cute squeebles and earning rewards. It is a motivational way of practising and includes extension (eg using knowledge to work out x14, x15 and worded problems). I think this is perfect for children who have been introduced to all the tables and now need to practise, consolidate and improve speed of recall. You can select individual tables but you need to complete all the table sections to rescue all your squeebles so, for that reason, I will hold off giving it to my younger children until they have met all the tables at school.
My boys like this app. When they complete a level (several types of games to choose) and reach a stage they can collect the Squeebles characters, a good incentive. Seems to help improve their learning of times tables while having fun. Good price for the app.