Hi everyone, I was a prolific poster in the early days of doing TH when my DS was having such terrible difficulties. I have not posted much recently but that has been because everything is so so much better and I hardly think about this anymore. 
I started TH with my DS in August 2012. He has an IQ of over 135 but ( yes, you guessed it!) was struggling to read and write, couldn't hold a pen, low energy, meltdowns, controlling and generally very difficult to be around. In a nutshell, he had DDS which manifest as symptoms of dyslexia, dyspraxia and ADHD and ASD. Prior to TH he was assessed for Retained Reflexes and he had retained every single Reflex. His reflexes were a mess, he was a mess and I was a gibbering wreck.
We started with RRT with Hemispheres in June 2012 but quickly changed to TH after I read Robin's book and read inspiring mumsnet posts from Indigobell, Badvoc and others. I have NEVER EVER regretted the decision to change and NEVER EVER regretted doing TH.
Like many of you I have looked at many many different therapies, Neurodevelopment, Vision therapy and Auditory Training, brushing, Handle, Sunflower and more....
The order I did things in was dyslexia assessment, BO assessment, RRT assessment and a month of RRT and then TH. I have also recently done AIT. With hindsight I would do the following.
Diet and supplements, ( Vegepa, zinc, magnesium, B vits and probiotic), TH and AIT. I would not do Behavioural Optometry as I think Engaging Eyes is better, and I would do TH over RRT)
We have been doing TH for 15 months. My son is doing well and is on the final part of the therapy, Lumosity. ( which are computer games.) AS things have got easier he has become more willing to do the exercises. I asked Robin at our last assessment how much longer we had got. He said most of next year. So, I think TH will take us just over 2 years, but it is so easy now and I think we could stop now and DS would be ok. But I don't want to stop. DS is still improving and the exercises are so much better.
Keep the faith everyone. It really, really is worth it. As Badvoc says, it is not a quick fix, you have to do it day in and day out for ages. But....the results are worth it.