In reply to CurlyStevo:
> Do you often climb multipitch? To my mind guide plates are really only useful in two scenarios. Bringing up two seconds that are climbing simultaneously as you are trying to save time (normally longish routes) and fast taking in on very long easy routes such as the North ridge of Piz Badile. For most other climbing uses I find the negatives outweigh the positives. I find a normal device better for bringing up seconds in general as I can easily pay out rope as they work out moves and down climb.
I agree as highlighted in another thread recently, they can be tricky to lower with, once your second has weighted the rope.
Another useful place for them is multi pitch ice or winter climbing as they offer a little extra security by acting as a form of auto locking device for half / twin ropes especially when you are belaying in gloves and doing all the other things that distract you from the important job of looking after your second when huddled on a winter belay ( like eating, wind milling your arms a bit, changing gloves, day dreaming about the next hot rock trip etc. etc.