Essential for flying indoors or even outdoors in tight spaces or for beginners. I would give them 5 stars but they can be a little tricky to install and then remove but will get better with practice. Tip: Take your time, make sure you have the right pair (e.g. FL/RL and FR/RR), do not force the propellers or motor/mounts, and make sure you that they are locked before starting and separated before removing. Also note that the guards aren't a cage like the DJI Mavic mini, but rather bumpers located slightly below and outside the supports. That means props can touch objects above them.