User Review: CAMP Stalker
Price Paid: $109 CDN
Great for ice walks on frozen canyon floors or for glacier travel. Obviously not for ice climbing because they can't be attached rigidly to your boots.
Flexibility makes them comfortable on almost any winter boot, and you can almost walk normally in them.
One nice extra is that the ones I bought came with antibot plates and a crampon bag. Nothing more to buy.
Remember to dry them off after use, and when putting them away for summer storage, dab them with oil to prevent rust.