Thanks to Carolinemaths's blog, I discovered Maths Whizz and enrolled my dyslexic son on it. Before this, he had been doing Kumon. He hated Kumon passionately. He found it very, very boring. However, it did mean that he made progress in basic arithmatic and that he learnt his times tables. He also discovered that you had to work at things to get better at them.
Personally, I did not enjoy having to trapse off to a centre once a week for Kumon and I hated having to have arguments with my son about why he had to continue to do Kumon. I still find stray Kumon pages hidden away in cupboards and under furniture, where he secreted them to get out of completing the full worksheets. Once he threw them all out of the window, but I retrieved them and made him finish them.
Also, Kumon does not teach your child how to do maths. They get the worksheets and have to figure it out by doing them. The maths tutor told me this worked, but my son could certainly have done with some one-to-one explanations sometimes. Certainly, I remember sitting down with him and explaining how to do multiplication because he was in tears of frustration over his multiplication worksheets.
For a while, after giving up Kumon, my son didn't do any extra maths, but I knew he needed something. I looked into private tutoring, but it was too expensive. Maths Whizz is the perfect alternative. It is tailored to your child's 'maths age' and, unlike Kumon, it is fun. It is computer-based, so no excursions to centres are required. It is cheaper than Kumon. And it rewards your child with 'credits' which they can spend on online Maths Whizz games (which incorporate more maths) or virtual toys for a virtual bedroom. My son aims to do it for 20 minutes a day and his 'maths age' has improved already, after only one month of use.
Maybe Kumon suits some personalities better than others and some children like rote learning and structure. It certainly didn't suit my son.