Unlike most other assisted braking devices on the market, the Edelrid Eddy is used almost like an ATC. By this I mean the lead line or live rope comes out of the front of the device, and the dead rope is closest to you. This makes the transfer from an ATC to this much easier. Also, to me this makes much more sense when paying out rope and taking in slack.
It is slightly on the heavy side, but it is a quality piece of kit. Edelrid have used hard wearing materials, hence its weight. As a result this device will outlast most other devices on the market, so its price seems irrelevant.
The Edelrid Eddy’s design is brilliant, the edges where the rope runs, are curved, and inside the barrel are a few bits made of plastic, all to reduce the wear on your rope. And with ropes being very pricey, and your life hanging on them, every little helps.
When paying out slack fast, it is not very sensitive, and will generally not get stuck. When you are belaying your friend on the crux of a route, and he/she is nervously pulling in slack fast to click their next quickdraw. The Eddy seems to know the difference between paying out slack for your climber, and a fall.
If on the other hand it does get stuck, all you do is pull back on the dead rope, to unstick the cam, then feed out the live rope again. Very easy device to use. Unlike the Petzl GriGri, where it feels that sometimes you need to have a hand or a thumb on the cam, to unlock it, to be able to feed rope again. Very clever by Edlerid, I say.