This is the first set of alcohol markers I've ever purchased, so I can't directly compare to others like Copics. I got them on the recommendation I've seen from other artists who have.
I've been very impressed, they are easy to use, the colors are vibrant, there is a wide selection in this set, and having a brush tip is very welcome. They provide a very satisfying instant result.
I did encounter one issue which had me initially concerned. One of the markers didn't have the cap fully on and it was completely dried out. I had seen other reviews stating they never got a response from support. I contacted support on Friday, they responded on Saturday asking for more information, and they sent out a replacement on Monday. I received it that Friday. Very fast, very responsive, very good service.
My recommendation is if you buy this or any set, test out 100% of the markers on the included color swatch cards. Make sure they're all working, if you have a problem contact them right away. Don't wait, that way if there are any problems you can return to Amazon.