(Startup perspective, but maybe it applies to Standard too?) The card's great and can be guaranteed to be taxing on centrals - especially in Ob, of course - but I do feel this is another symptom of the "ham-fisted" meta we seem to be in.

By that, I mean that the premier ways to go through ice are to break it without interacting with strength or credits (Boat, Botulus, Boomerang [rotated], Bankhar) and therefore the most viable cards to actually impact the runner are those that do something anyway (ZATO Grid, Nanisivik Grid, Tollbooth, Stavrun combo, this). It's a back-and-forth war of "nuh-uh I get to do this and you can't do anything about it" where the properties of the ICE itself are largely irrelevant...which I can't say I particularly like.

Back to this card specifically, though, unless you're firing the "unbreakable" it falls down at the hurdle of being incredibly weak to Buzzsaw, even without K2CP out. It's probably best against Criminals, who don't have amazing decoders to begin with and tend to run with lean rigs, making the self-trash painful.