I use markers as part of my multi-media projects. I had been using Rose Arts because they were inexpensive, but wanted something a little better to "level up" my art. A friend of mine recommended these, and boy, do they not disappoint!
First the colors: Color is almost velvety in how smooth it is. The tests I did were nearly perfect matches to the colors of the caps, too, so a test sheet is easy to match.
Blendability: Like with any marker, you want to use a bit of care when laying down the colors, but it's super easy to shade with these because they blend beautifully.
They also don't take too long to dry, so you won't make a mess of your paper.
I think that if you love Copics, but the price of them is a barrier, these are fantastic. They have very nearly the same quality, but at a fraction of the price. I definitely will keep using them, and will likely never use a different brand at this rate.