Basic but functional
It's cheap and it just about works. The timer is as basic as possible, and not precise. If you need precise timing or both sides to open at exactly the same time, spend more money. If you want your cat to get fed at roughly the correct time, the works. It ticks loudly but this is ok if you're not there. It continues to tick as long as it has batteries which would be annoying if using it daily. For occasional nights away, you'd want to remove the battery for storage anyway, so it's no big deal.