Today we went to Mutian Yu section and really loved it. We hired a driver and guide - if anyone wants a recommendation, please feel free to PM me.
We only spent about 90 minutes there as it was very cold, although it got warmer the further up we went. Some very steep steps to be climbed but so worth it for the views. I did struggle a bit but I'm pretty unfit, my 17 year old managed everything easily. I won't be taking my parents there next month when they visit as they have both had knee replacements & they just won't manage it all.
Would highly recommend this part, yes, it's a bit touristy and there are hawkers selling mostly tat in my view, but great experience & I will go back with hubby who couldn't come today.