Not sure what you mean "if I'm happy with it". I have one-stop shopping with sid, just like I do with Mint (or Debian) using the debian repositories. No hunting down packages or having to figure out dependencies. To me, my experience with Debian, Mint, and sidux are all about the same. No one distro was more or less stable than the other. It's like I have blue, green, and red shirts. Some days I wear red, some days blue or green. Some years I have more red than blue (or green), so then by default I'll pick red more often. All wear the same, perform the same.
If I find a red shirt missing a button one day, I'll switch to the green and sew the button back on the red when I get a chance. (just like fixing a kernel, etc)
What brought me to Debian was one-stop shopping.
What brought me to SID was apt-get update && apt-get dist-upgrade.