We used write from the start for 18 months. It's pretty much the standard way mainstream Romainians learn to write, I discovered as his Gran is a primary teacher over there. All children commence a very similar programme aged 7.
Ds can now write but it's neither legible, nor a reasonable speed, so school still use the alphasmart if they want more than a sentence from him. I think it's a great programme, but not a magic bullet if the dyspraxic issues are deep rooted iykwim. There's no way he'd have made the progress he has without it & suprisingly he was willing to do the 10 mins a day 5x a week needed to keep the flow going. (These things need to be done little & often to have a decent chance of success methinks).
I intend to do it again from scratch once we've finished his current bout of RRT, (can only fit so many interventions into one day what with pesky school interrupting it lol!). It's a very reasonable cost for what it does too, & I haven't found anything comparable that's as accessible for an ordinary parent to implement iykwim.
Indigobell wasn't as impressed with it though - thought I'd point that out in the interests of fairness.
We used London Children's practice for SALT assessment & I was really impressed. An OT assessment is £350 and then with the monthly ongoing costs of therapy it's out of my reach at present, but I live in hope. Deffo worth checking out if you can afford it.
If it helps DS sorted his independent pencil grip via a vertical whiteboard and marker & nowadays it's correct using a writing slope but he loses it if writing/drawing on a horizontal table for long. No issues with hypermoblity or strength or anything like that.
We use these pencils www.amazon.co.uk/exec/obidos/ASIN/B002SN9R2E/ref=ox_ya_os_product just cos I think they are more economical to send into school, and easier for DS to sharpen independently than the mechanical pencil. Also they don't stand out as "special" to the other kids iykwim.