Pros: Durability, Ease of Use, Effectiveness, Overall Quality
Great for quick touch ups on kitchen cutlery.
I've have one of these for years. It works great for quick touch ups, and that's what it's for. I don't think you could totally re-profile a blade with this, but for it's ease of use, it's a must have. I will make a sub note though, I only use it for my kitchen knives. I use a Lansky system for my pocket knives because I can get finer edge and I can choose my angle.