The system arrived 2 weeks ago and it's working great. It's not hugely different from my previous system but it's not got the faults ;the batteries last 6 hours instead of 2 minutes, the sound is much higher quality, screen is much brighter and touch screen works. It has a solid state hard drive which apart from being much more robust than a traditional hard drive is also lightning fast, resulting in reboots taking 30 seconds instead of 3 minutes. This might seem unimportant but two and a half minutes is a long time when you want to say something. It also has a webcam so I can video skype.
The only issue is with the eyegaze camera. It didn't work outside which is obviously a big problem. I have been talking to the camera manufacturers in Germany who have been incredibly helpful as this is a new problem. So with my assistance they released a new software version within 24 hours which has improved things considerably and further improvements will be developed soon.
Many thanks to Liam and Caroline for their help getting this sorted