I have it too - thought it a bit flimsy but still awesome. I've got the Porsche 911 GT3 RS too - took me about a week of evenings after work to build it ;-)
I have the Porsche too and what a great build it was, I thought I would be disappointed in the build and that It would not be as good as I remembered as a child, how wrong was I it was just as good and I really enjoyed it.
Ill be picking up the Caterham one day when I swing by a John Lewis
The porsche gt3 rs has been discounted to £175 in most outlets, really tempting, however in the meantime i have the bmw gs kit to occupy me over the bank holiday