This was the first time I've done the Royal Parks and I was not disappointed; good organisation and a nice flat course that showed London at its best.
My only big moan is about the last few miles being very congested and having to fight through selfish walkers (I won't call them runners) who decided to walk along chatting two, three or four abreast, blocking people from getting through.
Some walkers also had headphones in so even an 'excuse me' was useless and a shove was required.
The paths towards the end are narrow, so there needs to be signage encouraging walkers to stay to the side or on the grass - and headphones should be banned (at the risk of opening up an old debate...yawn). As I went with one of the later waves, I was running through the stragglers of earlier waves who had either gone off too fast or over-estimated their fitness and the paths were just not wide enough to cope.
That said, I was happy with my time and enjoyed the race a lot.