1.6.1 is working great for me but fair warning: Most of the themes I had installed do not work with 1.6.1. I lucked out n that my favorite theme, Baldr, works perfectly.
So a possible consequence of updating now is loosing your favorite theme(s).
Other than that, 1.6.1 is a delight. It seems smoother and smoother somehow. Very similar to the smooth feeling that OSX displays and contrasted with the typical hurky jerky Windows raggedness.
The new settings menu is a nice improvement and stability is much improved. With 1.4 I was seeing Cinnamon go down about every other day but after about week with 1.6.1 no crashes yet.
I am excited about how far Cinnamon has come in only around 6 months. An impressive effort and kudos to the team.
Can't wait to see what's next