For those reading this before going up the other reports are accurate - this is steep - very steep and relentless, but oh so worth doing.
We set off around 12:15pm and were back at the car park by 3:00pm with some short stops en route and about 20-30 mins on top (only on the east summit!).
As you'll see from the photos we had great weather and I must say something about the path, it is superb; the time, effort and money that has gone into creating this incredible route to the top and alowing the previous scar of a path to heal, deserves enormous recognition. This is a very busy route on a delicate hill and without the path things could get messy and dangerous.
The following image shows the east summit and somewhere up there are a very nice engaged couple trying to scramble to the top the hard way as some kind of pre-nuptual test of character

Below are some of the neighbours
Some views from the top (or as far as I was going)
We went back down to the main path and took the route west - a lot of people were retracing their steps, but if anything the return was gentler on the knees than I anticipate the way we came would have been.
All in all a cracking few hours spent testing the boots, which incidentally performed nicely and a route I highly recommend especially for the views