Finally got round to using the home cooker for the first time this weekend, so here are my initial thoughts:
Please share your first impressions overall of the HomeCooker? Was it what you expected?
The homecooker appears to be very well made and looks quite good in the kitchen. The controls are easy and intuitive (although I did have a bit of a duh! moment when I couldn't work out why it wasn't stirring before I realised I needed to press 'play' or set the timer!). The cutting tower I am less impressed with - I understand it has been designed to feed straight into the cooker, but it is bulky and oversized for what it is.
How did you find making the risotto recipe? Did it save you time in the kitchen?
As others have said, there was so much faffing around with the squash and pancetta that it didn't save huge amounts of time, but there was about 20 minutes where I didn't have to do anything other than let it cook which gave me time to tidy the kitchen up and sort out a load of washing.
I also had issues with the cutting tower not cutting the onion and celery properly.
What about the size? How does it compare to other appliances you may have?
It's a little on the large size - taller than my slow cooker but about the same width.
Instructions - easy to follow? Anything you didn't understand
The instructions are easy enough to understand. I'd like to see some more simple recipes that haven't been quite so Jamie-fied (I love his food but his recipes can be somewhat over involved when you just want to cook a quick, simple tea.) - some basics like mac cheese, spag bol etc would be good.
And what was the first thing you tried in it? How did it go? Anything you'd change for next time?
First thing I tried was the risotto. It was fine - a bit stodgy, so I might add a touch more stock or turn the temperature down a bit. We've also made the breakfast which was lovely, although again, the temperature probably needs to be reduced after the eggs have been added.
Any other comments?
Like the poster above, I am struggling to work out how I am going to incorporate the cooker into everyday use. While I can see it could be very useful for some, I am not sure yet it is useful for the sort of food that we cook on a daily basis.
I am sure however, that it would save me more time if I didn't stand and watch it stirring 
It's a great little gadget and I am hoping it will become a useful one in our kitchen rather than one that ends up in the back of the cupboard, although I am reserving judgement until I have tried a few more recipes.