Nice pen cutter for opening carton boxes and letters. It's definitely safer than knives or other cutters when used around kids. The ceramic blade works really well and cuts through everything, even some types of plastic. The reason I'm knocking down one star is because the actual built construction leaves a lot to be desired. The handle feels very flimsy and prone to breakage. I wouldn't mind paying a bit more for a metal housing or at least nice plastic/resin finish.

I had high hopes for this product but in practice, I have my doubts. Working in job that has me constantly cutting and reshaping cardboard boxes, I was looking for something that could equal, if not top the performance the nearly ubiquitous box cutter because of the dubious support of my employer. Having had some very positive experiences with ceramic kitchen cutlery, I am familiar with the sharpness durability and thought how wonderful if the same could be applied in box cutter. It worked in the most important respects but uncertainly arose as I continued to use it - let me tell you about it.

The slice pen cutter is essentially retractable crafting knife that uses the distinct ceramic blades. Compared the common metal blades, ceramic is more resistant to wear citing its hardiness and impervious to corrosion and electrical conductance. While the aforementioned might be better appreciated by chefs and electricians, its cutting durability is something anyone who needs to make definite cut will appreciate - a sharp knife is a safe knife and Slice of series of blades provide that critical edge.

Unfortunately, I cannot praise the actual pen cutter design. Made up entirely of plastic and held in place by notch and sliver of plastic rail, the longevity is in question. As a crafting knife I have no doubt it will do great with the materials and precise cuts involved but as a box cutting instrument - it does it well but for how long? Cutting through a box is no problem but I can already imagine the blade slipping out of the handle with encounters with glue spots or staples. It has not happened to me just yet but eventually it will because I am using this frequently. Another problem is the bulbous design of the handle - it will take some kind of a customized lanyard because the little more than ½in. radius, the average wrist strap landyard will not fit and the hole provided is large enough to accommodate paracord.

Ultimately, while the blade itself is great and cost-effective in regard to replacement rates, the holder is a bit more questionable as I do not see up the challenge of box cutting abuses in a warehouse setting. Now if you are like me - a responsible adult who cares for personal and company-issued tools - it might work great. If you are in arts and crafts, this might work out just as well. As a warehouse box cutter? Well if you respect the limitations of the plastic holder, you can get used to this.

We recently moved, so had tons of taped up boxes to open up. This pen cutter worked extremely well, even better than our traditional box cutter. It's also really easy to carry around. I also feel like this is much safer than the traditional box cutter. I highly recommend this!

We also got the small, pocket sized cutter made by the same company (Slice 10514 Mini Cutter, Ceramic Safety Blade, Pocket Sized, Auto-Retractable) and that one works excellent too.

Works surprisingly good. When I first saw it I thought it looked like it can't do much....but I've used it to open up all my boxes

I like the smaller one better, the base on this is round and sneaks out of your back pocket all the time