Yes you can climb ice with these...
I have used these crampons for a little over a year now. From 20-55 degree snow to high-altitude glacier travel to straight up and down waterfall ice. They work well for all of these purposes. I wonder sometimes if people just assumed they wouldn't work on vertical ice and then passed that off as solid advice. Sure they aren't the ideal waterfall crampon but they will definitely get the job done. They work at least as well as BD Sabretooth's which are billed as appropriate for vertical ice. The finish has held up well and so has the sharpness of the points even after plenty of use. These are great multi-purpose crampons similar to the Grivel G-12 which is harder to come across these days in the states. I would recommend them for anyone who wants a general mountaineering crampon that will also allow more extreme types of travel i.e. vertical ice.