There's insane value in this set - I haven't found any of mine dried out yet, but then again I haven't used them all. I make a lot of cartoon cards for friend/family and always use alcohol markers, and this has saved me a lot of money. Plus, with so many colors in the set it's nice to not have to worry about whether or not I'll have enough for any given cartoon.
So far, the ONLY thing I don't love about them is that I find a large discrepancy between the color on the cap and the actual color of the ink. They are without exception (to my eyes at least) all much darker and more pigmented, so be sure to test them out on a scratch pad before committing to the color.
That's a small gripe though, it's a great set. If you're looking for COPIC and not wanting to spend COPIC prices, this is your best bet.