My experience with my Maestrale RS. These boots absolutely rock!
Unfortunately on the 15th day or so both boots would not stay locked in ski-mode.
I called Scarpa and they sent me replacement ski/walk mechanisms which they look to have improved significantly.
I found it interesting that both boots failed on the same day. I think this only reinforces the fact the the ski/walk mechanism is significantly flawed. Look at the photo and you can see where the plastic gasket thingy wore and failed on both mechanisms. On the replacement parts this gasket looks to be made of metal instead of plastic which I am hoping permanently resolves this problem.
Attachment 135415
I would suggest that anyone who has these boots call Scarpa and get replacement mechanisms ASAP. It's only a matter of time until this gasket wears and fails. With the range of motion in walk-mode I can attest that skiing these in walk mode sucks big time.
my 2¢
j