I wouldn't really consider it having a problem with them. I guess I'm not good with having even tension on the strand on back and it's kind of boring to knit an i-cord when I need a long length. My first stitch is always a bit uneven, but my other stitches are always nice. It's just that first stitch that looks odd.
ETA: If my yarn was thinner I'd use my cute little hand cranked i-cord making machine. Unfortunately the machine hates worsted weight and heavier yarns.