Go-To Manual Life Saverby Wade Bieber on 03/21/2017
This is a wonderful device. I have been using it for years for belay and rapel, and have just started learning how to take full advantage of it's guide features. I love it.
My model is older, so it doesn't have the cut-outs. This means there are lighter ones on the market than mine, and there one ones lighter than the current design. I have not personally used them. I can only recomend this one. It is durable, light enough, and a design that has stood the test of time all over the world.
Most people will not need the guide features, but its worth having them if you think you might venture into that realm (multipitch or big wall).