Strange CSV result for quoted strings in go encoding/csv

I have this little bit of code that kept me busy the whole weekend.

package main

import (
    "encoding/csv"
    "fmt"
    "log"
    "os"
)

func main() {
    f, err := os.Create("./test.csv")
    if err != nil {
        log.Fatal("Error: %s", err)
    }
    defer f.Close()

    w := csv.NewWriter(f)
    var record []string
    record = append(record, "Unquoted string")
    s := "Cr@zy text with , and \\ and \" etc"
    record = append(record, s)
    fmt.Println(record)
    w.Write(record)

    record = make([]string, 0)
    record = append(record, "Quoted string")
    s = fmt.Sprintf("%q", s)
    record = append(record, s)
    fmt.Println(record)
    w.Write(record)

    w.Flush()
}

When run it prints out:

[Unquoted string Cr@zy text with , and \ and " etc]
[Quoted string "Cr@zy text with , and \\ and \" etc"]

The second, quoted text is exactly what I would wish to see in the CSV, but instead I get this:

Unquoted string,"Cr@zy text with , and \ and "" etc"
Quoted string,"""Cr@zy text with , and \\ and \"" etc"""

Where do those extra quotes come from and how do I avoid them? I have tried a number of things, including using strings.Quote and some such but I can't seem to find a perfect solution. Help, please?