Terrible! Ads keep crashing & support usually don't compensate your losses unless you have a screenshot, which is impossible during a sudden crash. We'll see if my latest attempt to recoup my losses after a crash is successful after a bad review or will I get the usual copy & paste response. Getting really close to Uninstalling! Update, got back a fraction of what I lost due to Rovio's long term problem, oh & a derogatory lesson on reducing the risk of encountering THEIR problem again !