Slow, drains battery & eats data (without even looking at the recordings) like nobody's business so background usage has to be turned off, which makes the system far less effective. The picture quality isn't the HD quality that was advertised - closer to an early 90s 8bit computer game at times. It's also a pain in the backside that the camera picks up the gases being vented from the boiler, meaning constant notifications when the wind is blowing in a specific direction.