The heavy reliance on web services and poor gesture processing create friction in the stock version, that escalate to gaps and dead ends in Graphene, I tried characterizing that as unstable, should have said unreliable, or something else that exceeds my current English language skills. Both versions fail to create a useful mobile device interface, it wastes an incredible amount of the time and attention of users, which I find highly problematic with a device type that already has an incredibly distracting, disruptive presence in everyday life. All subjective perception obviously.