I think Coco is the best nail salon in the Davisville area. And I've had several mediocre experiences in the neighbourhood. They recently moved from just south of the Art Shoppe to just north of Davisville, which is more inconvenient for me, but it speaks to my experience that I still go.
Staff are friendly and they do a consistently good job. That's what I look for in a cheap nail salon. They also do my boyfriend's pedicures and make him feel comfortable in a typically-women's venue. If they can, they do the mani pedis concurrently. Tends not to be too busy, but I'm sure appointments never hurt.