autolocking= secure multi pitching
- Familiarity: I've put it through the wringer
The auto locking feature is so awesome. it is a life saver on multi pitches, to know that your follower is secure, allows you piece of mind to take a photo, get ready for the next pitch, eat a snack and safely belay him/her up to you.
Auto locking can be hard to give slack with after it is loaded, which is something that should be thought about before setting it up. If there is potential that the pitch is steep and your follower will need a combination of slack given and taken often than it will be tough. You can clip a beaner to the small hole on the device to give you leverage but it is a little awkward.
This being said it is the best thing to happen to belay devices and is an amazing feature.