First impressions, first trip with. I bought a pair with FlexLock, I already have a pair of Grivel Air (aluminum), but I needed something more reliable for glacier / hard ice. It feel sturdy enough, very grippy and reliable in steeper ice slopes (glacier up and down climb), fast and easy to take off and put (even with gloves). It went very well with my Asolo Fugitive Gtx (summer, non-technical, non-rigid) boots. Easy and fast to adjust, if you have to change boots, no tool required.
Yes, I would recommend to a friend.