DS has done around 60 dives - thanks for the reference Indigo :)
Initially I approached this with scepticism and more to help another family member see if the tharpy benefits him and when we started it I saw some good changes and kept it going. DS has an aquired head injury so it may help him differently. He is less hyperactive which is his worst issue, and that gives better attention, eye contact, more speech and interaction so cant ask for more really.
We go to Walthamstow where it costs £10 per dive (20 min reccommended in a block) and i have met so many parents with asd and cp children that sware by it to be the top thing that is helping DC (most also do biomedical, ABA, retained reflexes, etc); most parents have been doing it for over 4 years and the results they claim are amazing.
The benefits vary for each child - some see difference after 10, some after 20, some after 100, some after 300...but in my research I havent come across negative side effects as such that may put me off. Parents report improvement with seizures too and Great Portland street hospital recommends it for CP and some ASD I was told.
I am still doing it even though I dont know whether is helping just temp or long term as I am doing lots of other things at the same time but after a dive which we usually do on a Friday or a Saturday DS is an angel and calmer and more content during the weekend.