Dry Erase Marker Set - Includes Six Pre-Filled Bullet Tip White Board Markers in Red, Blue, and Black, with Eight Ink Refill Tank Cartridges and Bonus Mini Eraser - 15 Pieces Total

These are excellent and it seems to use less plastic than throwing out one-use expo markers. The lines are usually clean and clear. Sometimes it takes some shaking or pushing to get the ink flowing after they have been sitting. I also don't like that the tips get crushed when you first open the ink containers by pushing in the tip.

I really like these markers. I teach high school physics, and although most of the info is presented by projector, I really need a good marker for the times I write on the board since I have a large room. Most markers I have used in the past will fade slowly over time. It was always a judgement call as to when to change markers. These Rethinc markers stay dark and sharp until the ink runs out (a long, long time). So I have great confidence when I pick it up that its gonna work.The tip design is also excellent. It will recess if you apply pressure so the tip is not blunted. I have large white boards at the student's tables. They actually use markers more than me. I have them use standard markers because they can abuse them so badly and the tip is ruined before the ink is gone. But I believe I am going to switch them to the Rethinc markers because the tip design is so good. I believe I will save money in the long run.The refills are very easy to put in. Five seconds to remove the old, five seconds to put in the new, and no mess at all.A few things though. First, I wish there was an option for all black markers. The red and blue are good markers, but black is best for my needs. Secondly, a pack of 8 refills costs as much as a pack of six pens with 8 refills. What's up with that? Next, a chisel tip option would be nice (like the other refillable markers I use)Finally, if Rethinc really wants to blast the market open, they should develop a very broad tip option, say 10 mm. I think they could keep the same body. So many people want the ability to draw thicker text for visibility in large rooms. Up until recently the only option was wet-erase markers (which I use), but they are expensive and the strength of the color fades with use.Overall, if you are using standard markers, you will not go back to them after trying these.

Markers dried and would not come off. They ruined my film production slate. Very disappointed!

Not bad, though it takes a bit to get them started the first time. I have not had to refill one yet. As a secondary option, these are awesome because they are a bit more cost effective, but they have not knocked my favorite off the top.

High quality, work well and of course they're refillable so that saves some plastic from being thrown away, but why not make them out of metal like other refillable marker brands. When going for environmentally friendly it only makes sense and that would get a 5 star from me

The dry erase markers was easy to use and the colors were vivid on every board my students and I used them on, the refillable cartridges saved my class and I monies that was used to buy other school supplies.I will be recommending them to the parents and my department head at the next PTA meeting.

I bought this for my kids. It is almost a month and I have ink in 2. I haven't touched the refils yet. Super happy with how long they last and how economical it is with refils.

I purchased three starter packs for instructors to try out and all three of them had the same complaints. When writing on a vertical surface the ink runs out VERY quickly so they have recharge the markers often. When writing on a horizontal surface they work great so we use them for the tutor centers but they did not work well for our wall dry erase boards. We have other refillable markers that don't have this problem but they are more costly, for now we'll stick to the more costly version since they don't have to be recharged while writing.