(All photos in my review were scanned onto my computer, rather than a photo. I also only use these Ohuhu markers to color everything in.)
I am very impressed with these markers! They have minimal streaking when you lay them down; no streaking at all if you know what you're doing. They also blend together fairly easily, though I didn't use any blending in my sample pictures. As for layering the colors, you do need to give the first layer a minute or two to dry, otherwise the ink will feather out.
The brush nib tips are small enough to color in some very small areas, as well as make blending easier overall. However, they do seem a bit fragile--if you're heavy-handed with these, I suspect the nibs will fray easily. Also, the color selection of this pack doesn't have a ton of options for skin. But other than that, these markers are great!