Hi. I am on the 2011 456 16″
I am 5’7″ with a short trouser leg size so probably 28-30″
By the sounds of it you will be fine.
I had the cable snap from just going up and down the street but i didnt really know what i was doing and yanking it pretty hard. went to the LBS and got a cable for £2.60 which is bit thicker and it seems to be doing the job a lot better.
Have a slight problem with getting it to stay in the lowest drop position at the mo but this may be to do with cable tension or even seat post tension apparently.
all in all it seems fine but does take a bit of getting used to using it as you have weight and unweight the saddle when using it. but worth the money to have a little experiment in my opinion.
not used it in anger on trails as yet so we shall see if it holds up to the trail abuse and i get used to how it works!!