And having put 100 miles on it on Saturday morning I can confirm that this is the best thing I've done for a very very long time (excepting getting married of course ahem!)
Beautiful sunny day, relatively open roads (at least first thing in the morning) and reasonably good pace.... all add up to an experience that when you throw in a roaring explosion of noise and petrol smells becomes the perfect cocktail.
What a thing! While it would be lovely to accelerate and stop like modern bikes can, and have the precision and road handling etc., I just don't think I'd enjoy that as much as this. It's perfect. I love it.
All the expense, the early starts for lessons, the shame of cocking up one of the tests, the expense (did I mention that): all well worth it. Everyone should experience this at least once!